Company Index
- O & H Construction Ltd. - London
- O & M Office Equipment Ltd. - Sutton
- O Jones - Llanidloes
- O Rooney Coach Hire Ltd - Newry
- O Seaman & Son Ltd. - Bury St Edmunds
- O Turner Insulation Ltd. - Grimsby
- O Widmann and Co Ltd - Richmond
- O & D Williams - Liverpool
- O & E B Gibbin - Whitland
- O & G Engineering Ltd - Banstead
- O & H Capital Ltd. - London
- O & H Estates Ltd. - London
- O & H Mobility - Brighouse
- O & H Removals - Chard
- O & H Tile Distributors Ltd - Tredegar
- O & H Watt - Stranraer
- O & K E Williams - Malpas
- O & M Electrical Services Ltd. - Halifax
- O & O Designs Ltd. - Aldershot
- O & P Construction Services Ltd - Rotherham
- O & S Construction - Downpatrick
- O & S Doors Ltd. - Dungannon
- O & S Renovations - Witham
- O ' Pen Office Solutions Ltd - Preston
- O A Chapman & Son Ltd - Bungay
- O A Curtis & Sons - Newmarket
- O A S Imports Ltd. - Oldham
- O A Steel Fabrication - London
- O and M Life and Pensions Ltd - Colchester
- O B Metals Co. Ltd. - Willenhall
- O B Builders - Warrington
- O B C Shipping Ltd. - Grangemouth
- O B Denison - Ipswich
- O B Properties - Swadlincote
- O B S Y S - Swindon
- O B W Engineering Services Ltd. - Liverpool
- O B Y Ltd. - Warrington
- O C & C Strategy Consultants Ltd. - London
- O C C Ltd - Harrow
- O C D Engineering Ltd - Belfast
- O C E U K (Birmingham) - Birmingham
- O C Jewellery Manufacturers and Design - Chester
- O C Jewers & Sons Ltd - Bury St Edmunds
- O C L Ltd - Basildon
- O C M Business Systems Ltd. - Pershore
- O C R A Worldwide - Douglas
- O C S Access Ltd. - Dartford
- O C S Consulting Plc - Borehamwood
- O C S Structural Plastics - Doncaster
- O C S Technical Services - Glasgow
- O C Supplies Ltd - Fareham
- O C T A Ltd. - Northwood
- O C W & A M Morgan - Haverfordwest
- O Comitti & Son Ltd. - London
- O D B Ltd - Southam
- O D B Group Ltd. - Godalming
- O D S Distributions - Manchester
- O D T (Europe) Ltd. - London
- O D Tranter - Usk
- O Davies - Stratford upon Avon
- O Design Ltd - Lichfield
- O E Group Ltd. - Stone
- O E Sunshades Ltd. - Mansfield
- O E C Ltd - Wakefield
- O E C People - Margate
- O E Clark & Son - Newark
- O E Document Solutions Ltd - Lincoln
- O E E S Ltd - Dunfermline
- O E Hoare & Son - Witney
- O E M Marketing Services Ltd - Enfield
- O E M Lighting Ltd - Bristol
- O E Morris & Sons - Presteigne
- O E S (London) Ltd. - Romford
- O E S International Ltd. - Cramlington
- O E S Medical Ltd. - Abingdon
- O E S Uk Ltd - Kendal
- O F S (Guernsey) Ltd. - Guernsey
- O F T Enterprises Ltd - Lowestoft
- O G Professionals Ltd. - Peterborough
- O G Davies & Sons - Carmarthen
- O G E Chapman & Son - Spalding
- O G F Ltd. - London
- O G Fabrications - Leeds
- O G Martin - Narberth
- O Gates - Pewsey
- O Ginestri & Sons - Larkhall
- O H Ltd. - Salcombe
- O H Lewis & Son - Llandrindod Wells
- O H P Development Ltd - London
- O H Price - Presteigne
- O Hare S Millers - Castlewellan
- O I C Partners Ltd - Milton Keynes
- O I L Engineering Ltd. - Aberdeen
- O I W (Steels) Ltd. - Benfleet
- O Imaging Corporation Ltd. - London
- O J Hallam & Son (Melton Mowbray) Ltd. - Melton Mowbray
- O J Smith Lighting Ltd - Bishops Stortford
- O J Stephens & Co. Ltd. - Caldicot
- O J Bouncy Castles - South Ockendon
- O J Jones - Amlwch
- O J S Jewellery Manufacturers Ltd. - Birmingham
- O J Smith - Bishops Stortford
- O J Thomas & Son - Llanfyrnach
- O J Williams - Montgomery
- O J Williams (Poole) - Poole
- O J Williams (West of England) (Bristol) - Bristol
- O J Wootton Ltd. - Dudley
- O K Scaffolding Ltd. - Aberdare
- O K Blinds - Mansfield
- O K Mugleston & Son - Romford
- O Kahn (Printers) Ltd. - London
- O Kane Irish Foods - Wembley
- O Kane Poultry Ltd. - Ballymena
- O Kay Automatics Ltd. - Redcar
- O L D Engineering Co. Ltd. - Hinckley
- O M & D M Jones - Newport
- O M C Poll Group Ltd - London
- O M C Joinery - Ilkeston
- O M Double Glazing - London
- O M Francis & Son - Launceston
- O M G Construction Ltd. - Bromley
- O M G International - London
- O M Harries - Haverfordwest
- O M I Architects (Glasgow) Ltd - Falkirk
- O M K Design Ltd. - London
- O M V Trading - London
- O M V Trading Services Ltd - London
- O M X Technology (U K) Ltd - London
- O N C Computers - Jarrow
- O Neill Distributors Ltd - Omagh
- O P Chocolate Ltd. - Merthyr Tydfil
- O P Engineering Ltd - Wolverhampton
- O P B Paper Sales Ltd. - London
- O P L (Worthing) - Worthing
- O P S - Nottingham
- O People - Wotton under Edge
- O Petherick & Son - Bude
- O Plcommercial Laundry Equipment - Worthing
- O R & J Vanstone - Okehampton
- O R & W H Parry - Holyhead
- O R A Lighting - London
- O R Bailey - Chichester
- O R C International Ltd. - London
- O R D Recruitment Ltd - Lanark
- O R Jewellers - Newry
- O R Jones & Sons Ltd - Holyhead
- O R S - Burton on Trent
- O R S Bearings Ltd - Manchester
- O Rings Ltd. - Chichester
- O Rouke S Joinery & Glazing Contractors - Hornchurch
- O S A Architects - Leeds
- O S F Ltd. - Wolverhampton
- O S Group Ltd - Sale
- O S Locke & Co. - Colchester
- O S P Architecture - West Byfleet
- O S Print Finishing Ltd. - Reading
- O S S Electrical Controls Ltd. - Oldham
- O Shepherd & Son Ltd. - Brackley
- O So Handi - Aylesbury
- O T Africa Line - Birmingham
- O T C Computing Ltd. - London
- O T C Direct Ltd. - Epsom
- O T D S Ltd - Croydon
- O T Drains - Workington
- O T M Consulting Ltd - Guildford
- O T M Servo Mechanism Ltd. - Egham
- O T R Tyres Ltd. - Alfreton
- O T S (Nw) Ltd - Ruthin
- O T W - Norwich
- O T W Chandler & Co - Abergavenny
- O Thomas - Haverfordwest
- O Toffolo & Son Ltd. - Hull
- O Travel - Gravesend
- O V Garland & Sons Ltd. - Shepton Mallet
- O W Owen - Pwllheli
- O W Wortley & Sons Ltd. - Thetford
- O W & R B Pritchard - Bodorgan
- O W & R J James - Goodwick
- O W L Security Services Ltd - Pontyclun
- O West - London
- O Wynn J & Rhian M Davies - Fishguard
- O' Brien Communications Ltd - Manchester
- O'Boyle Civil Engineering Ltd - Lincoln
- O'Brian Manufacturing Ltd. - Swadlincote
- O'Brien & Price (Cheltenham) - Cheltenham
- O'Brien Chartered Building Surveyors - Totnes
- O'Brien Construction Ltd - Thurso
- O'Brien Contractors Ltd - Leamington Spa
- O'Brien Properties Ltd - Johnstone
- O'Bryne & Kennedy - Waltham Cross
- O'Callaghan Brickwork Contractors - Slough
- O'Connell Plant & Groundworks Ltd. - London
- O'Connell Site Services - Liverpool
- O'Connell Site Services Ltd - Liverpool
- O'Connor Associates - London
- O'Connor Bros - Windsor
- O'Connor Builders Ltd. - Wembley
- O'Connor Construction Co. Ltd. - Cheltenham
- O'Connor Container Transport Ltd - Widnes
- O'Connor Davies J A - Cardiff
- O'Connor Engineering Ltd - Wakefield
- O'Connor Fencing Ltd - Moor Row
- O'Connor Plant & Construction - Purley
- O'Connor Sokolowski Partnership L L P - Croydon
- O'Connor Utilities Ltd. - Manchester
- O'Dell Signs - Hayle
- O'Doherty Bros Ltd - Londonderry
- O'Donnell Developments Ltd. - Birmingham
- O'Donnell Engineering - Littlehampton
- O'Donnell Kitchens - Dungannon
- O'Donnell Michael A - Wakefield
- O'Donnell Plant & Construction Ltd - Ellesmere Port
- O'Donovan Construction Management Ltd - London
- O'Dowd - Rowley Regis
- O'Dwyer McCall Iddon Ltd. - Salford
- O'Gara Construction Ltd. - Manchester
- O'Garas Plumbing and Heating - Middlesbrough
- O'Gormantaylor Ltd - London
- O'Grady Peyton International Recruitment U K Ltd. - Solihull
- O'Grady-Peyton International Recruitment - London
- O'Hagan & Madden - Newry
- O'Hagan Builders - Paisley
- O'Hagan Plant - Newry
- O'Hagans Sausages - Chichester
- O'Halloran - Warrington
- O'Halloran & O'Brien Ltd. - Morden
- O'Hanlon Bros Construction Ltd - Dungannon
- O'Hanlon Engineering - Dungannon
- O'Hanlons Brewing Co. Ltd. - Exeter
- O'Hanrahan Associates Search & Selection - Tenterden
- O'Hara Brian - Keighley
- O'Hara Bros Surfacing Ltd. - Pinner
- O'Hara Mushrooms - Enniskillen
- O'Hara Transport Ltd - Pinner
- O'Hara Waste Oils - Uxbridge
- O'Hare & McGovern Ltd. - Newry
- O'Hare & McGuinness Ltd - Newry
- O'Hare Associates Architectural Consultants Ltd - Newry
- O'Hare Coal Merchants - Newry
- O'Hare Joinery & Building - Liverpool
- O'Hare Transport - Lisburn
- O'Haren Ronnie P - Newport Pagnell
- O'Hares Jewellers - Chester
- O'Hearne & Partners - Bradford
- O'Herlihy & Co. Ltd. - Glasgow
- O'Kane & Devine Construction Ltd - Londonderry
- O'Kane & McLaughlin (Builders) Ltd - Londonderry
- O'Kane Food Service Ltd. - Lisburn
- O'Kane Fuels - Magherafelt
- O'Kane Plastics - Magherafelt
- O'Keefe Construction (Greenwich) Ltd (Westerham) - Westerham
- O'Keefe Construction (Greenwich) Ltd. - London
- O'Keefe Scanlon Ltd - West Byfleet
- O'Keeffe Groundworks Ltd. - Watford
- O'Leary & Goss Architects - Bristol
- O'Leary R Plant Hire - Hereford
- O'Leary William & Lottie - Knighton
- O'Mahoney Engineering Ltd - London
- O'Mahoney Engineering Services Ltd - London
- O'Malleys (Jarrow) - Jarrow
- O'Marah & Morris Groundwork - Wimborne
- O'Neill & Brady Ltd - Dungannon
- O'Neill & Brennan Construction Ltd. - Potters Bar
- O'Neill and Co Ltd - Glasgow
- O'Neill and Dixon Ltd - Bristol
- O'Neill Architectural Services - Chichester
- O'Neill Associates (Search & Selection) Ltd - Cardiff
- O'Neill Bros (Building Contractors) Ltd - Londonderry
- O'Neill Cleaning Ltd. - Kirkcaldy
- O'Neill Decorating - Bridgwater
- O'Neill Electrics - Omagh
- O'Neill Engineering Services Ltd. - Aberdeen
- O'Neill Medicalia Ltd. - Liverpool
- O'Neill Modern Media - Slough
- O'Neill of Clonoe Ltd - Dungannon
- O'Neill P - Bolton
- O'Neill Peck Associates Ltd. - Worksop
- O'Neill Planning Associates Ltd - York
- O'Neill Signs - Runcorn
- O'Neill Strategic Management - Southampton
- O'Neill Survey Systems Ltd - Bristol
- O'Neill Tool & Plant Hire Ltd. - London
- O'Neill Tractors - Newry
- O'Neills Irish International Sports Co L - Belfast
- O'Neills Ltd - Kingston upon Thames
- O'Neills Sportswear - Belfast
- O'Reilly Clark Printing Services - Enfield
- O'Reilly Transport (Ireland) Ltd - Enniskillen
- O'Reilly U K Ltd. - Farnham
- O'Reordan Building Contractors Ltd. - Leatherhead
- O'Rourke Civil Engineering Ltd - Grays
- O'Rourke Construction & Surfacing Ltd. - London
- O'Rourke Glass & Glazing - Oldham
- O'Rourke Groundworkers Ltd - Skipton
- O'Rourke Plant - Milton Keynes
- O'Rourke Surfacing Ltd - West Malling
- O'Shaughnessy Bros Ltd. - Huddersfield
- O'Shea & Tompkinson (Llanwrda) - Llanwrda
- O'Sullivan Anona - Harrow
- O'Sullivan Construction Ltd - Harrow
- O'Sullivan Lofts - Dudley
- O'Tuama Brian Architechts - London
- O-I Birmingham Machine Assembly Ltd. - Cradley Heath
- O-I Manufacturing Uk Ltd - Alloa
- O-Pro - Hatfield
- O-So-Kozee Ltd. - Barking
- O-Two Construction - London
- O-Two Pipelines Ltd. - Sheffield
- O-Vee Spring Gauges Ltd - Watford
- O-Video (UK) Ltd - Reading
- O. & H. Construction Ltd - London
- O.A. Barraclough Ltd - Hook
- O.C.Weathersbee & Partners Ltd - Wantage
- O.E.P (Scotland) - Livingston
- O.M.A. (U.K.) Ltd - Northwich
- O.R.C.A - Bordon
- O.S. Engineering - Liverpool
- O.S.Group Ltd - London
- O.S.R. International Ltd - Birmingham
- O1 Advanced Mechanical Services - Maldon
- O2 - London
- O2 - Slough
- O2 Communications Ltd. - Slough
- O2 Networks Ltd - London
- O2I Design Ltd - Langport
- O2OLAP Ltd - Woking
- Oa 5 Com Ltd - Much Hadham
- Oacis UK Ltd - Aberdeen
- Oadby Building Plastics Ltd - Leicester
- Oadby Plastics Ltd - Warrington
- Oadby Plastics Ltd. - Leicester
- Oades Plant Ltd. - Egham
- Oag Worldwide Ltd. - Dunstable
- Oak & Wood Ltd - Lingfield
- Oak Apple Embroidery - Sherborne
- Oak Appliance Testing - Birmingham
- Oak Brewing Co. Ltd. - Heywood
- Oak Building Services Ltd - Manchester
- Oak C W E Ltd - Belfast
- Oak Court (Denbridge) Residents Ltd - Sevenoaks
- Oak Couture - Nottingham
- Oak Die-Stamping & Engraving Co. Ltd. - Birmingham
- Oak Distribution (Grays) - Grays
- Oak Distribution (Uk) Ltd - Grays
- Oak Electrical Distributors Ltd - Telford
- Oak Engineering - Rhyl
- Oak Engineering Co. Ltd. - Hebburn
- Oak Engineering Co. (Old Hill) Ltd. - Cradley Heath
- Oak Enterprises - Rugeley
- Oak Environmental Solutions Ltd - Leyland
- Oak Excavations Ltd. - Birmingham
- Oak Fire Protection Ltd. - Ongar
- Oak Forest Foods Ltd. - Tipton
- Oak Homes Ltd. - Chester
- Oak House Consulting Group - Brixham
- Oak House Development Services Ltd. - Tadley
- Oak House Interiors - Orpington
- Oak I T Consultants Ltd - London
- Oak I T Management Services Ltd. - Bristol
- Oak Industrial Supplies - Sutton in Ashfield
- Oak Lea Homes Ltd. - Bury
- Oak Leaf Building Services - Windsor
- Oak Leaf Furniture - York
- Oak Leaf Gates - Hereford
- Oak Leaf Joinery - Peterborough
- Oak Leasing Ltd - Chepstow
- Oak Lodge Automatics Ltd. - Walsall
- Oak Lodge Designs - Alfreton
- Oak Maritime (U K) Ltd - London
- Oak Medical Services Ltd. - Brigg
- Oak Oilfield Consultants Ltd - London
- Oak Originals Ltd - Ware
- Oak Perfection Machinery Sales Ltd. - Brighton
- Oak Refrigeration and Mechanical Services Ltd - Leicester
- Oak Roofing - Birmingham
- Oak Software Ltd. - Coalville
- Oak Street Fabrication - Norwich
- Oak Street Sheds & Fencing - Brierley Hill
- Oak Systems Ltd. - Telford
- Oak Telecom Ltd. - Poole
- Oak Tree Cabinet Makers - Swindon
- Oak Tree Engineering - West Bromwich
- Oak Tree Farm Ltd. - Haverfordwest
- Oak Tree Forge - Paignton
- Oak Tree Homes Ltd. - Newark
- Oak Tree Landscapes - Chorley
- Oak Tree Machines Ltd - Guildford
- Oak Tree Polythene - Eye
- Oak Tree Press - Eye
- Oak Tree Property Services Ltd - Malton
- Oak Tree Tavern - Wrexham
- Oak Warehouse Ltd - Chester
- Oak Wood Furniture Manufacturers Ltd. - Pontypridd
- Oakbase Designs Ltd - Tilbury
- Oakbay Services Ltd. - Liverpool
- Oakbourne Construction Ltd - Bristol
- Oakbray Ltd - Stoke on Trent
- Oakbridge Business Consultants - Halstead
- Oakbridge Homes Ltd. - St Albans
- Oakbridge International Ltd - Haverhill
- Oakbridge Services Ltd. - Warminster
- Oakbuild London Ltd - Croydon
- Oakbuild Ltd - Bedford
- Oakburn Import-Export Ltd - Leamington Spa
- Oakbury Chartered Quanity Surveyors - Chislehurst
- Oakcad Ltd - Bletchley
- Oakchase Design Ltd - Basildon
- Oakcraft - Ripley
- OAKCRAFT at Holmsley Mill - Ringwood
- Oakcrest Builders Ltd - Bexleyheath
- Oakcrest Consulting Ltd - Morecambe
- Oakdale (Contracts) Ltd. - Richmond
- Oakdale Building & Restoration Ltd. - Edinburgh
- Oakdale Contractors Ltd. - Bradford
- Oakdale Design Services Ltd. - Newport
- Oakdale Fencing Ltd. - Bedworth
- Oakdale Homes (Pembrokeshire) Ltd. - Haverfordwest
- Oakdale Hydro Services (Training) Ltd - Blackwood
- Oakdale Interiors Ltd - Kendal
- Oakdale International Ltd - Lancaster
- Oakdale Project Management Services Ltd - Doncaster
- Oakdale Textiles Ltd - Manchester
- Oakden Leisure - Chepstow
- Oakdene Automatic Transmissions - Nottingham
- Oakdene Hollins Ltd - Aylesbury
- Oakdene Home Extensions Ltd. - Tadworth
- Oakdene Homes Plc - Reigate
- Oakdene Printing - London
- Oakdene Securities - Banstead
- Oakdene Services - Newtownabbey
- Oake Textiles - London
- Oakenhurst Aircraft Services Ltd. - Rayleigh
- Oakes Bros - Reading
- Oakes Bros Ltd - Horsham
- Oakes Bros Ltd - Hungerford
- Oakes Bros Ltd - Newbury
- Oakes E P & Son - Smethwick
- Oakes K C & Sons - Batley
- Oakes Leisure Ltd - Stourbridge
- Oakes Management Services Ltd. - Lowestoft
- Oakes Metering Consultancy Ltd. - Inverurie
- Oakes Specialist Excavations Ltd - Erith
- Oakes Studio - Birmingham
- Oakes Transport Ltd - Norwich
- Oakes Trevor & Susan - Birmingham
- Oakey D J & Son - Banbury
- Oakfield Cabinets Ltd - Antrim
- Oakfield Chemicals Ltd. - Sale
- Oakfield Construction C Eng Ltd. - Nottingham
- Oakfield Consultancy Partnership, The - Chester
- Oakfield Design North West Ltd. - Preston
- Oakfield Engineering - Maghera
- Oakfield Farm - Ascot
- Oakfield Fencing - Sunderland
- Oakfield Media - Henfield
- Oakfield Products Ltd. - Widnes
- Oakfield Recycling Ltd - Nottingham
- Oakfield Residents Ltd. - London
- Oakfield Tours Ltd (Enfield) - Enfield
- Oakfield Woodcraft - Bristol
- Oakford Technology Ltd - Chippenham
- Oakfords Ltd. - Kidderminster
- Oakham (Oakham) - Oakham
- Oakham Ales - Peterborough
- Oakham Engineering - Evesham
- Oakham Fabrications - Cradley Heath
- Oakham Fabrications & Engineers Ltd - Birmingham
- Oakham Holdings Ltd. - Preston
- Oakham Home Improvements Ltd. - Oakham
- Oakham Lift Supplies Ltd - Oldbury
- Oakham Sheet Metal Co. Ltd. - West Bromwich
- Oakham Toolhire (Oakham) - Oakham
- Oakham Tyre Co. (Rutland) Ltd. - Oakham
- Oakhill Holdings Ltd - Sittingbourne
- Oakhill Optical Laboratory Ltd. - Stourbridge
- Oakhill Tavern - Beckenham
- Oakhinge - Walsall
- Oakhinge Ltd. - Walsall
- Oakhouse (Uk) Ltd - Reading
- Oakhouse Curtains - Reading
- Oakhouse Foods (Wk) Ltd - Tonbridge
- Oakhouse Technical Services - Halifax
- Oakhouses com - Eastleigh
- Oakhurst (Building & Civil Engineering) Ltd. - Oxted
- Oakhurst (Southport) Ltd. - Southport
- Oakhurst Blinds Ltd - Salisbury
- Oakhurst Business Systems Ltd. - Hassocks
- Oakingham Q G Construction - Wokingham
- Oakinsen Ltd - Oldbury
- Oakita - Leighton Buzzard
- Oaklair Ltd. - Norwich
- Oakland Air Control Ltd. - Worcester
- Oakland Associates Ltd. - Sutton
- Oakland Building Services Ltd. - Enfield
- Oakland Calvert Consultants Ltd. - London
- Oakland Coachbuilders Ltd - Worcester
- Oakland Conservatories - Ashton under Lyne
- Oakland Conservatories - Manchester
- Oakland Construction Ltd. - Bristol
- Oakland Consulting Plc - Leeds
- Oakland Developments - Wigan
- Oakland Doors - Newtownabbey
- Oakland Excelsior Ltd. - Leicester
- Oakland Farms Ltd. - York
- Oakland Furniture Ltd - Market Harborough
- Oakland Garden Offices Ltd. - Southwell
- Oakland Glass & Joinery - Leicester
- Oakland Glass Ltd. - Dewsbury
- Oakland Green Homes Ltd. - Bedford
- Oakland House Recruitment Ltd - Newcastle
- Oakland House Shopfitters Ltd - Dewsbury
- Oakland International (Uk) Ltd. - Nottingham
- Oakland Leisure Ltd - Swansea
- Oakland Park Homes Ltd. - Bedford
- Oakland Pc Systems - Worcester
- Oakland Projects Ltd. - Colchester
- Oakland Stairlifts - Leicester
- Oaklands Computer Services - Rickmansworth
- Oaklands Farm - Nottingham
- Oaklands Joinery - Liverpool
- Oaklands Manufacturing Ltd. - Bradford
- Oaklands Mill Ltd - Coventry
- Oaklands Plastics Ltd - Coleshill
- Oaklands Signs - Dursley
- Oaklands Systems - Benfleet
- Oaklea Contracts - Llanelli
- Oaklea Drafting Ltd. - Selby
- Oaklea Enterprises Ltd - Halifax
- Oaklea Ltd - Woodhall Spa
- Oaklea Nurseries Ltd. - York
- Oaklea Products - Telford
- Oakleaf Building Service - Windsor
- Oakleaf Candles Ltd - Harrow
- Oakleaf Coaches - Barnsley
- Oakleaf Conservatories Ltd - York
- Oakleaf Consultancy Ltd. - Northampton
- Oakleaf Enterprise - Guildford
- Oakleaf European Ltd. - Bournemouth
- Oakleaf Facilities (Uk) Ltd. - Northampton
- Oakleaf Furniture Ltd - Durham
- Oakleaf Garden Design Ltd - Nottingham
- Oakleaf Industries - Honiton
- Oakleaf Partnership - London
- Oakleaf Press - Maidstone
- Oakleaf Products Ltd - Blackpool
- Oakleaf Reproductions Ltd - Keighley
- Oakleaf Surveying Ltd. - Northampton
- Oakleaf Technical Services Ltd. - Northampton
- Oakleigh Building Services Ltd. - Horsham
- Oakleigh Cabinets Ltd - Altrincham
- Oakleigh Cases Ltd. - Potters Bar
- Oakleigh Consulting Ltd. - Manchester
- Oakleigh Nursery - Harlow
- Oakleigh Resourcing Ltd - Knutsford
- Oakley (U K ) Ltd - Letchworth
- Oakley 100 Ltd - London
- Oakley Arnold Ltd. - Broseley
- Oakley Coach Builders - Attleborough
- Oakley Coachbuilders - Ware
- Oakley Creative Ltd - Manchester
- Oakley Environmental Ltd - Windsor
- Oakley Furniture (Berkshire) Ltd - Wallingford
- Oakley Green Nurseries Ltd. - Bristol
- Oakley Integrated Business Solutions Ltd - Basildon
- Oakley M V B - Rye
- Oakley Media Ltd - Rugby
- Oakley Mini Diggers - Basingstoke
- Oakley New Build Ltd - Tonbridge
- Oakley Nursery - Wisbech
- Oakley of Brentwood - Brentwood
- Oakley Offset - Leicester
- Oakley Plant Ltd. - Scarborough
- Oakley Products Ltd - Corby
- Oakley Projects Ltd - London
- Oakley Properties (Bedford) Ltd - Bedford
- Oakley Soils & Concrete Engineering Ltd. - Bury St Edmunds
- Oakley Turf Farm - Colchester
- Oakley's Fuel Oils Ltd - Telford
- Oakley's Ltd - Shrewsbury
- Oakleys Agricultural Accountants - Hereford
- Oakliffe Rotajet Ltd - Ossett
- Oakline Construction Ltd - Woking
- Oaklodge Homes Wessex Ltd. - Calne
- Oaklyn Construction Ltd. - Macclesfield
- Oakmace Exhibitions Ltd. - Waltham Abbey
- Oakmain Ltd. - Newport
- Oakman Engineering Ltd. - Chelmsford
- Oakmasters - Haywards Heath
- Oakmere Construction Ltd. - Tarporley
- Oakmere Property Management Ltd - London
- Oakmere Safety Consultancy - Northwich
- Oakmere Technical Services Ltd. - Chester
- Oakmil Developments Ltd - Exeter
- Oakmoor - London
- Oakmoor - Tonbridge
- Oakmount Control Systems Ltd. - Plymouth
- Oakmount Estates Ltd. - Surbiton
- Oakpark Alarms Security Services Ltd - Buckingham
- Oakpath Ltd - Enfield
- Oakrange Engineering Ltd - Rotherham
- Oakridge - High Wycombe
- Oakridge Business Aid - Rotherham
- Oakridge Direct Ltd. - Tredegar
- Oakridge I.T. Ltd - Bristol
- Oakridge Internet Ltd. - Prenton
- Oakridge Steel Ltd. - Blackwood
- Oakroyd Engineering Ltd. - Fleet
- Oakroyd Ltd. - Ilkley
- Oaks Plant Hire Ltd. - Sevenoaks
- Oaks Specialists Execavations - Erith
- Oakshaw Engineering - Wakefield
- Oakshore Ltd. - London
- Oakshott & Co. Ltd - Gloucester
- Oakside Construction Ltd - Stockbridge
- Oakside Services Ltd - Swadlincote
- Oakside Solutions Ltd. - Dudley
- Oaksmere Refrigeration Design and Consultancy Ltd. - Stowmarket
- Oakstead (Homes) Ltd. - Leatherhead
- Oakstead Service Station - Jarrow
- Oakstone - Slough
- Oakstrong Engineering Ltd. - Seascale
- Oakswell Ltd. - Melton Mowbray
- Oakswood Ltd. - Preston
- Oaktarget - Leicester
- Oaktex Ltd - London
- Oakthrift Corporation Ltd. - Borehamwood
- Oaktree Builders - Cheltenham
- Oaktree Construction Services Ltd - Newton Abbot
- Oaktree Consulting - Barnet
- Oaktree Executive Ltd. - Yateley
- Oaktree Interiors Ltd. - Wokingham
- Oaktree IT Services Ltd - Billericay
- Oaktree Joinery - Stoke on Trent
- Oaktree Pine - Birmingham
- Oaktree Plastics & Engineering Ltd - West Bromwich
- Oaktree Snooker & Pool Ltd. - Neath
- Oaktree Uk Ltd - Bury St Edmunds
- Oaktrees Ltd - Manchester
- Oakvale Joinery Ltd. - Aylesbury
- Oakview Inspections Ltd - Harrow
- Oakville Ltd. - London
- Oakwade Ltd - Hartlepool
- Oakway - Sidcup
- Oakway CCTV Sound and Light - Southminster
- Oakway Homes Ltd. - Cirencester
- Oakway International Ltd - Kings Lynn
- Oakway Ltd - Croydon
- Oakway Mechanical Equipment - Northampton
- Oakweb Design Ltd - Mansfield
- Oakwell Brand - Liverpool
- Oakwell Brewery - Barnsley
- Oakwell Builders - Hitchin
- Oakwell Fencing - Leeds
- Oakwell Garden Products - Cleckheaton
- Oakwell Interiors Ltd. - Barnsley
- Oakwell Management Services Ltd. - Ilkeston
- Oakwell Packaging Ltd - Batley
- Oakwell Projects (Leeds) Ltd. - Leeds
- Oakwell Repairs - Barnsley
- Oakwood Air Conditioning - Cheadle (Cheshire)
- Oakwood Bespoke - Knutsford
- Oakwood Builders - Skegness
- Oakwood Builders (Cheltenham) Ltd. - Cheltenham
- Oakwood Building Contractors Ltd - South Croydon
- Oakwood Building Ltd. - Huddersfield
- Oakwood Business Systems Ltd. - Royston
- Oakwood Carpentry & Upvc - Walsall
- Oakwood Construction - Coventry
- Oakwood Construction & Development Co. Ltd. - Sittingbourne
- Oakwood Construction (Derby) Ltd. - Belper
- Oakwood Corporation Ltd - Loughton
- Oakwood Demolition Ltd - London
- Oakwood Door Designs Ltd. - Antrim
- Oakwood Environmental Ltd. - Godalming
- Oakwood Fabrications - Leeds
- Oakwood Fencing Services Ltd. - Witham
- Oakwood Fuels Ltd - Newark
- Oakwood Groundworks Ltd - Waterlooville
- Oakwood Kitchen Design Consultants Ltd. - Wakefield
- Oakwood Lettings Ltd - Gerrards Cross
- Oakwood Mantels of Leek - Leek
- Oakwood Manufacturing - Leicester
- Oakwood Mills - Bathgate
- Oakwood Nursery - Waltham Abbey
- Oakwood Plant Group Ltd. - London
- Oakwood Professional Services Ltd - Godalming
- Oakwood Roofing - Leeds
- Oakwood Selection Ltd. - Cranleigh
- Oakwood Staff Solutions Ltd. - Bristol
- Oakwood Steel Fabrications Ltd - Leeds
- Oakwood Traditional Furniture Ltd. - Chester
- Oakwood Travel - Liverpool
- Oakwood Upholstery Ltd. - Warrington
- Oakwood-Spinks Ltd - St Austell
- Oakwoods Ice Cream - Bedale
- Oakwoods Joinery Ltd. - London
- Oakworth Estates Ltd - Shoreham by Sea
- Oakworth Ltd. - Kidderminster
- Oakwrights Bath Ltd. - Corsham
- Oamps (U K) Ltd. - Esher
- Oanablok - Mold
- Oare's Coaches Ltd - Holywell
- Oarsport Ltd - Nottingham
- Oasis - Witney
- Oasis Aquarium - Salford
- Oasis Art & Graphics - Birmingham
- Oasis Art and Craft Products Ltd - Kidderminster
- Oasis Blinds - Caerphilly
- Oasis Blinds - Liverpool
- Oasis Blinds & Flooring - Kidderminster
- Oasis Cladding Ltd - Richmond
- Oasis Computer & Communications Centre - London
- Oasis Design Studio - Antrim
- Oasis Document Systems - Milton Keynes
- Oasis Electronics Ltd - Milton Keynes
- Oasis Engineering Ltd. - Merthyr Tydfil
- Oasis Environmental Ltd - Chesterfield
- Oasis Europe Ltd. - Reading
- Oasis Foods Ltd. - High Wycombe
- Oasis Genomics Ltd - Hitchin
- Oasis Interiors Ltd - Southampton
- Oasis Internet Services Ltd - Norwich
- Oasis Leisure Products Ltd. - Doncaster
- Oasis Ltd - Slough
- Oasis Marquees - Scarborough
- Oasis Media Services Ltd - London
- Oasis Metal Products Ltd. - Monmouth
- Oasis Personnel Ltd - Northampton
- Oasis Plant Hire Ltd. - Poole
- Oasis Pool Products - Sandwich
- Oasis Products Vending Services Ltd. - Twickenham
- Oasis Recruitment Group Ltd. - Fareham
- Oasis Recruitment Ltd. - Stevenage
- Oasis Search Ltd. - London
- Oasis Specialist Tent Hire - Hertford
- Oasis Specialist Tent Hire - Stevenage
- Oasis Stores Ltd - Belfast
- Oasis Stores Ltd - London
- Oasis Stores Ltd - Newcastle upon Tyne
- Oasis Stores Ltd. - London
- Oasis Tableware - Coventry
- Oasis Television Ltd. - London
- Oasis Training Consultancy Ltd - Chertsey
- Oasis Water Garden Products Ltd. - Eastleigh
- Oasis Wholefoods - Rickmansworth
- OasisBars - Northampton
- Oast House Marketing Ltd - Ashford
- Oast House Media Ltd. - Deal
- Oast Technical Services Ltd - Ashford
- Oasthouse Engineering Ltd. - Sheffield
- Oaston Engineering Ltd. - Nuneaton
- Oastwood Ltd - London
- Oasys Ltd - London
- Oasys Technologies Ltd. - Letchworth
- Oasys Uk Ltd - Letchworth
- OAT (Oxford Automotive Technologies) Ltd - Daventry
- Oatenvale Ltd. - Ilkeston
- Oates & Maynard Ltd - Sevenoaks
- Oates Fork Lift Trucks - Selby
- Oates R F H & Son - Newark
- Oatlands Glass & Glazing Services Ltd - Weybridge
- Oatlands Quarry (Douglas) - Douglas
- Oatley Associates Ltd - Corsham
- Oatley Vineyard - Bridgwater
- Obam Domestic Lifts Services Ltd. - Lincoln
- Oban Scallop Gear - Oban
- Obara Corporation - Derby
- Obart Pumps Ltd - Maidstone
- OBAS UK Ltd - Preston
- Obbm Ltd. - Exeter
- OBC Shipping Ltd - Stockton on Tees
- Obd Systems Ltd. - Trowbridge
- Obducat Camscan Ltd. - Cambridge
- Obe - Ringwood
- Obek (U.K.) Ltd - Wellingborough
- Obelisk Carpentry - Wellingborough
- Obelisk Engineering - Wellingborough
- Obergine - Oxford
- Oberlanders Architects Llp - Edinburgh
- Oberlin Filter Ltd - Newton Aycliffe
- Oberon Books Ltd - London
- Oberon Engineering Ltd - Havant
- Oberon I T & Photographics Ltd. - Sheffield
- Oberthur Card Systems Ltd. - Tewkesbury
- Obesa Cantavit Ltd - Grimsby
- Obesity International Trading Ltd - London
- Obex Business Systems - Halesowen
- Obex Protection - Worcester
- Obi & Moo - Nottingham
- Object Architecture Ltd. - London
- Object Carpet UK - Cranbrook
- Object Professionals Ltd - Harrow
- Object View Ltd - St Albans
- Objective Answers Ltd - Cheltenham
- Objective Computing Ltd. - Basildon
- Objective Intuition Ltd. - Ware
- Objective Professional Services Ltd. - Ascot
- Objective Research - Eastbourne
- Objective Results Ltd - Reading
- Objective Services Ltd. - Aldershot
- Objective Worldwide Learning Ltd - London
- Objectivity Ltd - Coventry
- Objectpower Ltd - Hove
- Objects Ltd - Leeds
- Objects of Class Ltd - London
- Objectsecurity Ltd. - Cambridge
- Objectware Ltd - Crawley
- Oblica Consultants Ltd. - Carmarthen
- Oblique Developments Ltd. - Brierley Hill
- Obm Systems - Hounslow
- Obo (Uk) - Knutsford
- Oboyle Roofing Ltd - Ballymena
- OBR Occupational Services Ltd - Telford
- Obscura Access - Braintree
- Observant Electronics Ltd - Melksham
- Observatory Sciences Ltd - Cambridge
- Obsideo Technologies Ltd. - Dorchester
- Obsidian Engineering Consultants Ltd - Aberdeen
- Obslogic Ltd - Waterlooville
- Obslogic Ltd. - Waterlooville
- Obsys Projects Ltd - Swindon
- Obtainrare Ltd - Hartlepool
- Obtainwise Ltd - Northampton
- Obvious Solutions Employment Agency - Linlithgow
- Obviously Morgan Ltd - Glasgow
- Oby Logistic Services Ltd - London
- OC Floor Screeding Ltd - London
- OC Interiors - Southampton
- OC Services - Northampton
- OC Vision - East Cowes
- OC2 Ltd - Leeds
- Oca U K Ltd - Liverpool
- Ocapel Ltd - Jersey
- Ocas Ltd. - Maidenhead
- Occ Computer Personnel (Northern) Ltd. - Nantwich
- OCC Recruitment Consultants - Hove
- Occam Hr Ltd. - Saffron Walden
- Occam Systems Ltd. - Ludlow
- Occasion Cakes - Bristol
- Occasional Cakes - Brierley Hill
- Occasional Cuisine Ltd. - Farnham
- Occasional Gifts Ltd - Hitchin
- Occasionally Yours - Nottingham
- Occasions Cake Studio - Grays
- Occasions Catering Hire Ltd. - Dunmow
- Occasions Hire - Rotherham
- Occasions Limousine - Hartlepool
- Occasions Party Hire - Ashtead
- Occhea Ltd - Solihull
- Occhnet Ltd - Carmarthen
- Occident Ltd - Leeds
- OCCO Coolers Telford Ltd - Telford
- Occupancy Marketing - Edinburgh
- Occupational Counselling Consultants - Hove
- Occupational Health & Environmental Assessments Ltd. - Waterlooville
- Occupational Health & Safety Bureau - Newport
- Occupational Medicals Ltd. - Stockport
- Occupational Performance Solutions Ltd. - Worcester
- Occupational Research Center - Berkhamsted
- Occupational Testing & Recruitment - Worksop
- Occupational Testing Ltd. - Worthing
- Occupational Training & Recruitment Ltd - Mansfield
- Oce (Uk) Ltd - Manchester
- Oce Graphics U K Ltd. - Brentwood
- Oce Imagistics (Uk) Ltd - Brentwood
- Oce-Printing Systems (U K) Ltd - Brentwood
- Ocean Air Distribution Ltd - Nottingham
- Ocean Architects Ltd - Newquay
- Ocean Bathroom Products Ltd. - Hatfield
- Ocean Bathrooms (U K) Ltd - Burntwood
- Ocean Blue Media - Poole
- Ocean Blue Sailing & Golf Trophies - Malpas
- Ocean Blue Seafoods Ltd - Grimsby
- Ocean Blue Software - Bristol
- Ocean Bounty Ltd. - Grimsby
- Ocean Bridge Associates - Plymouth
- Ocean Builders Supplies - London
- Ocean Building Supplies - London
- Ocean Business Supplies Ltd - Cardiff
- Ocean Chain Systems Ltd - Edgware
- Ocean City Recruitment Ltd - Portsmouth
- Ocean City Recruitment Ltd - Southampton
- Ocean Communications Ltd - Redhill
- Ocean Contract Cleaning Ltd. - Luton
- Ocean Corporate Hygiene - Sunbury on Thames
- Ocean Corporation Specialist Recruitment Ltd. - Wokingham
- Ocean Design & Management Ltd. - High Wycombe
- Ocean Design Careers Ltd - London
- Ocean Dynamics UK Ltd - Stockport
- Ocean Electronics Ltd - Gosport
- Ocean Energy Systems Ltd - Crewe
- Ocean Engineering Services Ltd - Accrington
- Ocean Environmental Ltd - Fareham
- Ocean Fleets Ltd - Plymouth
- Ocean Green Surfboards Ltd. - Newquay
- Ocean Grove Developments Ltd - Reading
- Ocean Homes Ltd - Newmilns
- Ocean Hydraulics Ltd - Camborne
- Ocean Industrial Cleaning - Hoddesdon
- Ocean Industries Ltd. - Bristol
- Ocean Insight Ltd - Southampton
- Ocean Instruments Ltd - Edinburgh
- Ocean Internet Ltd - Cannock
- Ocean Internet Solutions - Newquay
- Ocean Kinetics Ltd. - Shetland
- Ocean Lighting Ltd - Middlesbrough
- Ocean Magic Surf Shop - Newquay
- Ocean Management Consultants Ltd - Wembley
- Ocean Meat and Trading Co - Southampton
- Ocean Media Events Ltd. - London
- Ocean Nets Ltd - Shetland
- Ocean Noldings - Bridgwater
- Ocean Office Supplies Ltd - Bradford
- Ocean Oil (U K) Ltd - London
- Ocean Palace - Preston
- Ocean Partners Holdings Ltd - Maidenhead
- Ocean Press - Lancing
- Ocean Press & Publishing Ltd. - London
- Ocean Rainwear Ltd. - Milton Keynes
- Ocean Recruitment Ltd - Oxford
- Ocean Recruitment Services - Ipswich
- Ocean Resourcing Solutions Ltd. - London
- Ocean Roofing Services - Winchester
- Ocean Safety - Plymouth
- Ocean Safety Ltd - Southampton
- Ocean Safety Ltd (Port Glasgow) - Port Glasgow
- Ocean Scientific International Ltd. - Havant
- Ocean Search & Selection Ltd. - Southampton
- Ocean Services (Sw) Ltd - St Austell
- Ocean Shipping Consultants Ltd. - Chertsey
- Ocean Signs - Exeter
- Ocean Sports - St Austell
- Ocean Straits Ltd - Worksop
- Ocean Structures Ltd - Laurencekirk
- Ocean Studio Ltd - Southport
- Ocean Systems (U K) Ltd - Wilmslow
- Ocean Systems Ltd - Fleet
- Ocean Technical Systems Ltd - Sutton
- Ocean Tiles (N I ) Ltd - Lisburn
- Ocean Timber & Plywood Ltd - Ware
- Ocean Tooling - Loughborough
- Ocean Tooling Ltd - Hinckley
- Ocean Trading Ltd - Eastleigh
- Ocean Trailers Ltd - Iver
- Ocean Venture Seals Ltd. - Hornsea
- Ocean Wave Europe Ltd - Wickford
- Ocean Work Systems Ltd. - Westhill
- Ocean Yacht Equipment - Cowes
- Ocean Yacht Mouldings - Lymington
- Ocean Yacht Systems Ltd. - Christchurch
- Ocean-Design Co. Uk Ltd - Cranbrook
- Ocean-Led Ltd - Leicester
- Ocean-Led Ltd. - Leicester
- Ocean-Tec Systems - Aberdeen
- Oceana Trading Ltd. - Basingstoke
- Oceanair (International Removals) Ltd - Enfield
- OceanAir - Bristol Office - Bristol
- OceanAir - London Office - London
- OceanAir - Nottinghamshire Office - Kirkby in Ashfield
- OceanAir - Sussex Office - Horsham
- Oceanair Marine Ltd. - Chichester
- Oceanamber Ltd - Saltburn by the Sea
- Oceanblue Chandlery - Helston
- Oceanchem Ltd - Slough
- Oceanclean Group Ltd - Fareham
- Oceaneering Inspection - Gloucester
- Oceaneering International Services Ltd - Aberdeen
- Oceaneering International Services Ltd - Stockton on Tees
- Oceaneering Multiflex - Dunfermline
- Oceanfix International Ltd. - Aberdeen
- Oceanfix Ltd. - Beaconsfield
- Oceangrove Geoscience Ltd - Ellon
- Oceanic (S W) Ltd. - Honiton
- Oceanic Maritime Ltd. - London
- Oceanic Resources International Ltd. - Ware
- Oceanic Services Ltd. - Bristol
- Oceanic Wine Brands Ltd. - Ledbury
- Oceanis Bathroom Studio Ltd. - Barnsley
- Oceanloft Ltd - St Helens
- Oceans Apart Ltd - Chorley
- Oceans-Esu Ltd - Barnsley
- Oceansafe (Shetland) Ltd - Shetland
- Oceanscan Ltd - Aberdeen
- Oceanside Business Machines - Redruth
- Oceansound Ltd. - Camberley
- Oceanteam Logistics Ltd - Slough
- Oceanview Consultancy Ltd. - Sandwich
- Oceanweb Ltd - Douglas
- Oced Ltd - Birmingham
- Ocelot Systems Ltd. - Warminster
- Ochil Joiners - Alloa
- Ochil Timber Products Ltd - Denny
- Ochil Transport Ltd - Stirling
- Ochils Ltd - Perth
- Ochre House Ltd - London
- Ochre Management Services Ltd. - Ashford
- Ochre Woodcraft - Bolton
- OchreSoft Technologies - Swindon
- OCIUSB2 Ltd - Runcorn
- OCJ Logistics Ltd - Manchester
- Ockendon Motor Spares - South Ockendon
- Ockert Pool Ltd - London
- Ocktcom Ltd - Stratford upon Avon
- Ockwells Ltd (Warrington) - Warrington
- Ocl (Sheffield) Ltd. - Sheffield
- Ocm Networks Ltd - Alcester
- Ocm Networks Ltd - Stratford upon Avon
- OCM UK High Speed Doors Ltd - Barry
- Ocme UK Ltd - Newbury
- Ocmis Ltd. - Martock
- Oco Consultants Ltd. - Belfast
- Oco Ltd. - Dartford
- Ocon Construction Ltd - Salford
- OCP Ergonomic Office Furniture Supply - Dunmow
- OCS Checkweighers Ltd - Witney
- Ocs Computers - Christchurch
- Ocs Glazing Systems Ltd - Pontefract
- OCS Group UK Ltd - Manchester
- OCS Security - Morecambe
- Octacom Ltd. - Sevenoaks
- Octagon Communications Ltd - Ashton in Makerfield
- Octagon Contract Furnishers - Birmingham
- Octagon Design & Marketing Ltd. - Worksop
- Octagon Design Ltd. - Belper
- Octagon Europe Ltd - Edinburgh
- Octagon Leisure Ltd - Uxbridge
- Octagon Marketing Services Ltd. - London
- Octagon Products - Daventry
- Octagon Specialist Engineering Ltd - Glenrothes
- Octagon Technology Ltd - Lincoln
- Octain Developments Ltd - Twickenham
- Octal Sys - Northolt
- Octane Interactive Ltd - Barnsley
- Octane Magazine - Maidenhead
- Octapharma Ltd. - Manchester
- Octarine - London
- Octarine Investments Ltd - Bristol
- Octaveward Ltd - Darwen
- Octavia Consultants (Scotland) Ltd - Glasgow
- Octavian Security Ltd - Nottingham
- Octavius Hunt Ltd. - Bristol
- Octec Ltd - Bracknell
- Octica Professional Ltd - Staines
Octink - Brentford- Octo Petroleum Services Ltd - Brechin
- Octo Product Development Ltd - Gateshead
- October - Nottingham
- Octopi Ltd - London
- Octopi Ltd. - London
- Octoplus Products Ltd. - Wigan
- Octopus Cabling Ltd. - Colchester
- Octopus Collation Solutions Ltd. - Derby
- Octopus Computer Associates Ltd - London
- Octopus Electrical Ltd. - Shrewsbury
- Octopus Instruments Ltd. - Bedale
- Octopus Interiors Ltd - London
- Octopus Office Products Ltd - Stockport
- Octopus Printers & Stationers - Falmouth
- Octopus Publishing Group Ltd. - London
- Octopus Sportswear - Belfast
- Octree Computers - Letchworth
- Ocular Press Ltd. - Wigston
- Oculo Ltd - Basingstoke
- Ocv Fabrics Uk Ltd. - Andover
- Ocyt 1 Ltd - Manchester
- Ocyt 2 Ltd - Newcastle upon Tyne
- Ocyt 3 Ltd. - Larbert
- Od Consultancy Ltd. - London
- Od Developments & Projects Ltd. - London
- OD Engineering - Leicester
- Od Resourcing - London
- Odd (Oxford) Ltd. - Chipping Norton
- Odd Box Design - Liverpool
- Odd Job Building Co Ltd - Derby
- Odd Jobs - Cranleigh
- Odd-Copy Ltd - Gloucester
- Oddball Juggling Co - London
- Oddball Training Ltd - Heathfield
- Oddballs International Ltd - London
- Oddessy Technologies Recruitment - Watford
- Oddfellows Arms - Wigton
- Oddjob Carpenter - Cardiff
- Oddono's Gelati Italiani Ltd - London
- Odds Car Hire - Rochester
- Odds Farm Park - High Wycombe
- Oddschecker (Jersey) Ltd - Jersey
- Oddworks Ltd. - Windsor
- Oddy B & B C - Coventry
- Oddy Hydraulics Ltd. - Leeds
- Oddysee Computers Ltd - Norwich
- Oddyssey Glass Ltd. - Halifax
- Ode Operations (Great Yarmouth) - Great Yarmouth
- Odedra Trading Ltd - Matlock
- Odegy Ltd. - London
- Odeisis Foods - London
- Odel (Irl) Ltd. - Banbridge
- Odell Associates - London
- Odeon Furniture Co. Ltd. - Tredegar
- Odescan Ltd. - Chelmsford
- Odessa Corporate Services - Edinburgh
- Odgers International Ltd - London
- Odgers Ray & Berndtson - Aberdeen
- Odgers Ray & Berndtson - Leeds
- Odgers Ray & Berntson - Glasgow
- Odin Consulting Engineers Ltd. - Glasgow
- Odin Engineering Ltd - Coventry
- Odin Research and Development - Newark
- Odin Solutions Ltd - Hayes
- Odin Technology Ltd - Reading
- ODIS - Limerick
- Odjobs Ltd. - Ascot
- Odl Europe Ltd. - Liverpool
- Odlin & Graves - Louth
- Odlings Ltd. - Hull
- Odlings M C R (Ellesmere Port) - Ellesmere Port
- Odlings M C R Ltd. - Ellesmere Port
- ODM Office Discount Megastore - Brighton
- ODN Logistics Solutions Ltd - Waltham Abbey
- Odon Enterprise Ltd - Cowbridge
- ODonovan Electrics Ltd - Coventry
- Odour and Dust Solutions Ltd - Kilmarnock
- Odour Control Systems Ltd. - Deeside
- Odour Kill - Darlington
- Odour Services Ltd - Stafford
- OdourNet UK Ltd - Bradford on Avon
- Odran Helay - Corsham
- ODU (UK) Ltd - Loughborough
- ODYN Systems Ltd - Sandbach
- Odysea Export & Import Agents - Dagenham
- Odyssey - Nottingham
- Odyssey (G B) Ltd - Rochdale
- Odyssey Bazaar Ltd - Ramsgate
- Odyssey Bedrooms & Kitchens - Bedford
- Odyssey Computer Services Ltd - Hook
- Odyssey Consulting Engineers Ltd - Basingstoke
- Odyssey Fashions - London
- Odyssey Interactive Ltd - Altrincham
- Odyssey Online (New Zealand) Ltd - Selby
- Odyssey Publisher Services Ltd. - London
- Odyssey Systems - Stockton on Tees
- Odyssey Technologies Ltd. - Farnham
- Oegen Ltd - Beeston
- Oel-Held (Uk) Ltd. - Denbigh
- Oem - Secureseal - Enfield
- OEM Automatic Ltd - Leicester
- Oem Louvres & Lighting - Keighley
- OEM Lubricants Ltd - Otley
- Oemeta (Uk) Ltd - Banbury
- Oemeta Chemische Werke Gmbh - Banbury
- Oep Furniture Group Plc - Waltham Abbey
- Oep Raterad Ltd - Lancaster
- Oerlemans Foods UK Ltd - Grimsby
- Oerlikon Balzers - Milton Keynes
- Oerlikon Fibrevision Ltd. - Macclesfield
- Oerlikon Leybold Vacuum UK Ltd - Chessington
- Oerlikon Optics Uk Ltd. - Oxford
- Oes - Blackburn
- Oes Supplies Ltd - Bristol
- Oetiker UK Ltd - Horsham
- Oetzmann & English Ltd - Dereham
- Ofalis Ltd - Ammanford
- OFEC Consulting Ltd - Oxford
- Off Limit Engineering Ltd - Christchurch
- Off Limits Corporate Events Ltd - Nottingham
- Off My Head - Manchester
- Off My Head - Newark
- Off Plan International Ltd - Guildford
- Off Roaders - Neath
- Off Sales - Bristol
- Off Shore Fuels Ltd - Hartlepool
- Off Site Solutions (RT) Limited - Highbridge
- Off Sure Imports Ltd - Newark
- Off the Wall (Uk) Ltd - Bradford
- Off The Wall Imaging - Melton Mowbray
- Off The Wall Marketing Ltd - Norwich
- Off to a Tee - Milton Keynes
- Off to Lunch Ltd - London
- Off to Work - Birmingham
- Off Trax Ltd. - Brentford
- Off Zero Ltd - Cullompton
- Off-Road Northern Ireland Ltd. - Belfast
- Off-the-shelf net - Ripley
- Offa Industries Ltd - Knighton
- Offaplan Ltd. - Daventry
- Offchurch Engineering Developments Ltd. - Hinckley
- Offer Management Ltd - Chichester
- Offerblock Ltd. - Leicester
- Offerclass Ltd. - London
- Offerframe Ltd - Leicester
- Offerlaunch Ltd. - Liverpool
- offers4profits.co.uk - Nottingham
- Office & Industrial Cleaners (Scotland) Ltd. - Bellshill
- Office 999 Ltd - Warrington
- Office Academy Ltd - Stevenage
- Office Aids Displays - Enfield
- Office Allsorts Ltd - Nottingham
- Office Angels (Ipswich) - Ipswich
- Office Angels Ltd - Aberdeen
- Office Angels Ltd - Belfast
- Office Angels Ltd - Dundee
- Office Angels Ltd - Edinburgh
- Office Angels Ltd - Glasgow
- Office Angels Ltd - Hull
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- Office Angels Ltd - Portsmouth
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- Office Blind Systems Ltd - Epping
- Office Blinds and Glazing Ltd - Rochdale
- Office Business Supplies - Tamworth
- Office Centres UK Ltd - Canterbury
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- Office Chairman Ltd. - Northampton
- Office Champions Employees Ltd. - Farnham
- Office Choice Jersey Ltd - Jersey
- Office Cleaning (Northern) Ltd. - Wilmslow
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- Office Clearance and Wholesale Ltd - Swindon
- Office Complete Ltd - Stockport
- Office Concept Ltd - Northwood
- Office Control - Solihull
- Office Data Supplies - Gateshead
- Office Depot (Holdings) 3 Ltd - Leicester
- Office Depot International - Birmingham
- Office Depot International (Uk) Ltd (Belvedere) - Belvedere
- Office Depot Uk Ltd - Andover
- Office Depot Uk Ltd (Edinburgh) - Edinburgh
- Office Design Team Ltd, The - Southampton
- Office Economy - Bristol
- Office Electrics Ltd - Wakefield
- Office Electronics Centre (U K) Ltd. - Great Yarmouth
- Office Employment Services - Chelmsford
- Office Engineering Services Ltd - Glasgow
- Office Equipment - Bexhill on Sea
- Office Equipment & Trade Services - Chatham
- Office Equipment Centre (1978) Ltd - Douglas
- Office Equipment Marketing Ltd. - Rugby
- Office Equipment Resale Ltd. - Horncastle
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- Office Equipment Servicing Ltd - Wellingborough
- Office Equipment Uk Midlands - Lichfield
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- Office Essentials - Winsford
- Office Essentials Ltd - Nottingham
- Office Etcetra - Bangor
- Office Express - Sutton Coldfield
- Office Express (Jersey) - Jersey
- Office Force - Peterborough
- Office Freedom - Basingstoke
- Office From Home Ltd. - Polegate
- Office Furniture (UK) - London
- Office Furniture 2000 (U K) Ltd - Nottingham
- Office Furniture and Interiors Ltd - Southampton
- Office Furniture Centre - London
- Office Furniture Channel - York
- Office Furniture Company Ltd, The - Berkhamsted
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- Office Furniture New & Used - Walsall
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- Office Image Ltd. - Cardiff
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- Office Interiors Anglia Ltd. - Ipswich
- Office Interiors Wholesale Ltd. - Keighley
- Office Jobs Ltd - Bromley
- Office Landscapes - Birmingham
- Office Life - Sunderland
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- Office Lines Ltd. - Burton on Trent
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- Office Manager - Wilmslow
- Office Medical Supplies Ltd - Birmingham
- Office Needs Direct (UK) Ltd - Diss
- Office Needs Ltd. - Exeter
- Office Oasis Ltd. - Nottingham
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- Office Options (Midlands) Ltd. - Wolverhampton
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- Office People - Chichester
- Office People Recruitment Ltd - Woking
- Office Personnel Scotland Ltd - Edinburgh
- Office Plan Ltd. - Witham
- Office Planet Ltd. - London
- Office Plus - Ipswich
- Office Plus Ltd. - London
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- Office Principles - Reading
- Office Projects Ltd. - London
- Office Reality Ltd - Wellington
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- Office Seating Ltd. - Birmingham
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- Office Services (Nantwich) Ltd - Crewe
- Office Solutions - Stockton on Tees
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- Office Solutions North West - Stockport
- Office Specialties Ltd. - Selkirk
- Office Sportswear - Bootle
- Office Storage Solutions Ltd - London
- Office Structures Ltd - North Ferriby
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- Office Style Ltd - Hatfield
- Office Supermarket.co.uk - Twickenham
- Office Supplies Now Ltd - Rochdale
- Office Support Ltd - Hereford
- Office Team - Basingstoke
- Office Team - Bristol
- Office Team - Edinburgh
- Office Team - Leeds
- Office Team - Milton Keynes
- Office Team - Windsor
- Office Transformation Ltd - Walton on Thames
- Office Update - Leicester
- Office Update Furnishings - Leicester
- Office Update Ltd. - Leicester
- Office Visions (Wales) Ltd. - Cardiff
- Office Warehouse - Derby
- Office Watch - High Wycombe
- Office Water Coolers Ltd - Rugeley
- Office Way Ltd - Long Eaton
- Office World (Basildon) - Basildon
- Office World (Blackpool) - Blackpool
- Office World (Cheltenham) - Cheltenham
- Office World (U K) Ltd (Cambridge) - Cambridge
- Office World (Wigan) - Wigan
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- Office World Ltd (Aylesbury) - Aylesbury
- Office World Ltd (Gateshead) - Gateshead
- Office World Ltd (Stockport) - Stockport
- Office World Ltd (Warrington) - Warrington
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- Office-Seats.co.uk Ltd - Aylesford
- Office-Shadow Ltd - London
- Office2me - Chesterfield
- OfficeCare Ltd - Derby
- Officecore Ltd - Gloucester
- Officecruit Ltd - London
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- Officeforce Ltd - Peterborough
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- Officemost Projects Ltd. - Bolton
- Officepark Ltd - London
- Officepark Ltd. - Crowthorne
- Officers Association (Auxiliary) Ltd - London
- Officers Association Scotland - Edinburgh
- Offices Please Ltd - Northampton
- Officeset Ltd. - Southall
- Officestar Group Ltd. - Coleford
- Officestor - Huntingdon
- OfficeSTOR Installations - Crook
- Officeteam - Birmingham
- Officeteam - Glasgow
- Officetec (Uk) Ltd. - Chelmsford
- Officevision Ltd. - Sawbridgeworth
- Officewise Co. U K Ltd (Bangor) - Bangor
- Officewise Co. Uk Ltd. - Chester
- Officexpress Europe Ltd. - Bradford
- Official Space - London
- Official Technologies Ltd - Leamington Spa
- Officiency I T Networks & Installations Ltd. - Jarrow
- Officlean Ltd. - Wolverhampton
- Offington Land Surveys Ltd - Worthing
- Offix Ltd - Southampton
- Offizone Ltd. - Stockport
- Offko Overseas Supply Co. - Tunbridge Wells
- Offland Associates - Swindon
- Offmains - Nottingham
- Offord & Associates - London
- Offord & Brock Hatmakers - Whitchurch
- Offplan-Investor - Manchester
- offplanpropertyworld.com - Birmingham
- Offrisk Consulting Ltd. - Glasgow
- Offscreen - Long Eaton
- Offset Marketing - Eastleigh
- Offset Productions Ltd. - Aylesford
- Offset Services Ltd. - Warrington
- Offset Supplies (Yorkshire) Ltd. - Sheffield
- Offsetadviceco - London
- Offshoot Ltd (Warrington) - Warrington
- Offshore Business Solutions Ltd - London
- Offshore Contractors Association - Aberdeen
- Offshore Design Engineering Ltd - Kingston upon Thames
- Offshore Developments Engineering Co Ltd - Rochdale
- Offshore Distribution & Fulfilment Ltd - Jersey
- Offshore Electronics Ltd - Guernsey
- Offshore Executive Recruitment - Jersey
- Offshore Product Services Ltd - Lincoln
- Offshore Ship Designers - IMT Ship Design - Montrose
- Offshore Shipbrokers Ltd - Aberdeen
- Offshore Shipbrokers Ltd - London
- Offshore Sourcing Ltd - Dorchester
- Offshore Specialist Appointments Ltd - Douglas
- Offshore Stainless Supplies Ltd. - Walsall
- Offshore Steel Boats - Barton upon Humber
- Offshore Structures Ltd - Reigate
- Offshore Systems (Uk) Ltd. - New Milton
- Offsight It Services Ltd. - Cannock
- Offsite IT Ltd - Maldon
- Offsite Ltd. - Chelmsford
- Offspring International Ltd - Brierley Hill
- Offtek Ltd. - Solihull
- Offtowork.Co.Uk - London
- Offtree Ltd. - Skipton
- Ofgem's London Office - Glasgow
- Ofimat Ltd. - Horsham
- Ofiz.com - London
- OFP Timber Frame - Sandwich
- Ofquest Holdings Ltd - Oxford
- Ofquest Interiors Ltd. - Milton Keynes
- Ofquip - London
- Ofs International Ltd - Nelson
- Ofs Software Ltd - Farnham
- OFTEC - Ipswich
- Oftec Services - Dundee
- Oftenwell Ltd. - Mold
- Og Sport Ltd. - Banbury
- Ogan International Trading (O I T ) Ltd. - Chelmsford
- Ogden (Transteel) Ltd. - Pudsey
- Ogden Demolitions Ltd - York
- Ogden F & Son - Keighley
- Ogden Fibres Ltd. - Keighley
- Ogden of Harrogate Ltd. - Harrogate
- Ogden Safety Systems Ltd. - Tadcaster
- Ogden Skip Hire Ltd - Ashton under Lyne
- Ogden Transtore Industries - Ossett
- Ogee Ltd - Leeds
- Ogee Tek Ltd - London
- Oger U K Ltd. - London
- Oggle Ltd - Milton Keynes
- Oggul - Croydon
- Oggys Cakes - Lichfield
- Oggys Novelty Cakes - Lichfield
- Ogier Electronics Ltd - St Albans
- Ogif - Hamilton
- Ogihara Europe Ltd. - Telford
- Ogilby Construction Ltd. - Chesterfield
- Ogilvie Builders (Stirling) - Stirling
- Ogilvie Construction Ltd - Stirling
- Ogilvie Group Ltd - Stirling
- Ogle A N - York
- Ogle Models & Prototypes Ltd. - Letchworth
- Oglesby & Limb Ltd - Newark
- Oglesby and Limb Ltd - Newark
- Oglesby George A - Warrington
- Ogley Brothers Ltd. - Sheffield
- Ogmore Vale Bakery Ltd. - Bridgend
- Ogp Uk Ltd. - Derby
- Oguns Ltd - Kingston upon Thames
- Ogwen Valley Transport Ltd - Bangor
- Ogwyn Evans - Carmarthen
- Ohaslams - Northallerton
- Ohaus (U K) Ltd. - Leicester
- Ohe-Ifpma Database Ltd. - London
- Ohgon Electronics - Canvey Island
- Ohm Electronics Ltd. - Harrow
- Ohm Ltd. - Aberdeen
- Ohm Marine Engineering - Colchester
- OHM Security Ltd - Leeds
- Ohm Surveying Instruments - Southampton
- Ohm Uk Ltd - Knutsford
- Ohmeda - Swindon
- Ohmega Ltd. - New Milton
- Ohmega Systems Ltd - Tamworth
- Ohmicron Ltd - Poole
- Ohs Ltd. - Birmingham
- OID Services - London
- Oikos Storage Ltd - Canvey Island
- Oil - Aberdeen
- Oil & Gas Associates Ltd - Dunstable
- Oil & Gas Systems Ltd - Ely
- Oil & Steel Express Parts Ltd - Laurencekirk
- Oil & Water - Shaftesbury
- Oil & Water Ltd (Bristol) - Bristol
- Oil & Water Ltd (Southampton) - Southampton
- Oil - Dri (U K ) Ltd. - Wisbech
- Oil Analysis Services Ltd - Sevenoaks
- Oil and Gas Project Consultants Ltd - Woking
- Oil Boiler Warehouse Ltd. - Norwich
- Oil Burner Spares - Worcester
- Oil Check Laboratory Services Ltd - Doncaster
- Oil Cleaning Bio-Products Ltd - Royston
- Oil Cleanse (UK) Ltd - Bordon
- Oil Companies International Marine Forum - London
- Oil Depot Services Ltd - Horley
- Oil Direct - Dromore
- Oil Equip Procurement Serve Ltd - London
- Oil Fired Heating Services - Carrickfergus
- Oil Ignition Lessees - Altrincham
- Oil Inspections Ltd - Billingham
- Oil Internet Ltd. - London
- Oil Inventions Ltd. - Walsall
- Oil Masters - Newton Abbot
- Oil Plus Ltd. - Newbury
- Oil Pollution Environmental Control Ltd - Batley
- Oil Recruitment Ltd. - Knutsford
- Oil Salvage Ltd - Bootle
- Oil Services South West Ltd. - Okehampton
- Oil Skimmers - Tamworth
- Oil Slick Dispersants Ltd. - York
- Oil Spill Products Ltd - Chester le Street
- Oil Spill Response & East Asia Respons - Southampton
- Oil Spill Response & East Asia Response Ltd. - London
- Oil States Industries (U K) Ltd. - Aberdeen
- Oil States Klaper Ltd - Aberdeen
- Oil States Klaper Ltd - Bathgate
- Oil States M C S Ltd - Aberdeen
- Oil States MCS Ltd - Barrow in Furness
- Oil Tank Co - Oakham
- Oil Tank Installation Services - Oswestry
- Oil Tank Supplies Ltd - Moreton in Marsh
- Oil Technics Ltd - Montrose
- Oil Warm Ltd - Cullompton
- Oilandgasjobsearchcom Ltd - Stockport
- Oilandgasjobvacancies.com - Caerphilly
- Oilband Ltd. - Chester
- Oilbase Management - Aberdeen
- Oilbuyers Ltd - Glasgow
- Oilfast Scotland Ltd - Bellshill
- Oilfield Chemical Technology Ltd. - Aberdeen
- Oilfield Consulting Ltd - Leven
- Oilfield Material Management Ltd. - Aberdeen
- Oilfield Medics - Preston
- Oilfield Production Consultants (O P C) Ltd - London
- Oilfield Production Support Group Ltd. - Aberdeen
- Oilfield Publications Ltd - Ledbury
- Oilfield Solutions Ltd. - Inverurie
- Oilfield Testing Services - Great Yarmouth
- Oilfield Tool Inspection Ltd. - Banchory
- Oilgear Towler Ltd. - Leeds
- Oiline Ltd. - Tipton
- OilRecruiter.net - Walton on Thames
- Oilsearch Plc - Malvern
- Oilspace Inc - London
- Oilswell Ltd - Brighouse
- Oiltech International (Services) Ltd - Moreton in Marsh
- Oiltube Ltd. - Aberdeen
- Ois Plc - Cradley Heath
- Oj Fresh Ltd. - Camberley
- Oj Ltd - Rochdale
- Ojedo Ltd - Belfast
- OJM Recruitment - Fareham
- OK Coal - Leek
- Ok Designs International Ltd. - Stourbridge
- OK Electrics - Leeds
- Ok Food Products - Birmingham
- OK International (Europe) Ltd - Bury St Edmunds
- OK International Ltd - Chandlers Ford
- Ok Micros Ltd - Birmingham
- OK Services - Sutton in Ashfield
- Ok Welding Marine Ltd - Belfast
- Ok(Welding Alloys)Ltd - Belfast
- Okaro Ltd. - Wigston
- Okasan Medical Ltd - Farnborough
- Okay Engineering Services Ltd. - Market Harborough
- Okazaki Manufacturing Co - Mountain Ash
- Okb Medical Ltd - Chichester
- Okehampton & Crediton Skip Hire Ltd. - Crediton
- Okehampton Photo Centre - Okehampton
- Okeland Ltd - Cranleigh
- Okell & Son Ltd - Douglas
- Okemoor Quality Foods - Okehampton
- Oken Trading Ltd - Leeds
- Okey Dokey Karaoke & Disco - Canvey Island
- Oki (U K) Ltd. - Glasgow
- Oki Europe Ltd. - Hounslow
- Oki Semiconductor (U K) Ltd. - Slough
- Oki Systems (Uk) Ltd. - Slough
- Oknet Ltd - London
- Okpol UK Ltd - Lichfield
- Oktopus Contracts Ltd - Bromsgrove
- Oktopus Recruitment Ltd - Bromsgrove
- OKW Enclosures Ltd - Fareham
- Ola Ltd. - Glasgow
- Olaf Hoeg Ltd - Ashbourne
- Olagden Packaging - Manchester
- Olam Europe Ltd. - London
- Olango - Leominster
- Olberon Ltd - Nottingham
- Olberon Ltd. - Nottingham
- Olchon Valley Contracting Ltd - Hereford
- OLCI Construction Training - London
- Old & Modern Furniture - Halstead
- Old Bailey Press - London
- Old Barn Farm Ltd. - Edenbridge
- Old Barn Model Craftsmen - Lancing
- Old Barn Nurseries Ltd. - Horsham
- Old Barn Nursery - Carmarthen
- Old Basing Saddlery - Basingstoke
- Old Bell 3 Ltd. - Ludlow
- Old Bexley Pine - Bexley
- Old Bim Ltd. - Pudsey
- Old Blackfriars - Aberdeen
- Old Broad Street Research Ltd. - London
- Old Bushmills Distillery Co. Ltd. - Bushmills
- Old C E - Wadebridge
- Old Castle Flats Ltd. - Newark
- Old Chapel Bed Centre - Market Drayton
- Old Chapel Pine - Ferndown
- Old Coal Yard - Barry
- Old Cooperage Saddley - Sunderland
- Old Country Pine - Otley
- Old Dairy Saddlery Ltd - Swindon
- Old Dalby Construction - Melton Mowbray
- Old Devon Pine - Honiton
- Old Dixton Removals & Light Haulage - Monmouth
- Old English Architectural Ltd - Coalville
- Old English Interiors - Northampton
- Old F D L - London
- Old Fashioned Foods (U K) Ltd. - London
- Old Ford Ltd. - London
- Old Forge - Stowmarket
- Old Forge Designs - Saffron Walden
- Old Forge Engineering - Ingatestone
- Old Forge Pine - Stalybridge
- Old Forge Pine Furniture - Lewes
- Old Girovend Ltd - Tewkesbury
- Old Hall Farm - Lowestoft
- Old Hall Performance Ltd. - Birmingham
- Old House Holdings Plc - Birmingham
- Old House Interim Services Ltd. - Evesham
- Old House Store Ltd - Henley on Thames
- Old India Spice Co Ltd - Leicester
- Old Kent Coaches Ltd. - Dartford
- Old Kist - Huddersfield
- Old Knebworth Executive Transport - Knebworth
- Old Manor Mill - Newtownards
- Old Manse Joinery - Coleraine
- Old Manse Tree Services - Newtownabbey
- Old Mill Chimneys - Clydebank
- Old Mill Farm - Haywards Heath
- Old Mill Furniture - Sudbury
- Old Mill Guns - Petworth
- Old Mill Sales - Banbridge
- Old Model Co. Ltd - Chichester
- Old Oak Engineering - Blaenavon
- Old Oak Joinery - London
- Old Orchard IT - Calne
- Old Orchard Properties Ltd - Swindon
- Old Oxted Pine - Fordingbridge
- Old P C - Dorchester
- Old Park Cutters - Bristol
- Old Park Engineering Services Ltd. - Cradley Heath
- Old Park Farming (Lytchett) Ltd. - Poole
- Old Park Foods Ltd. - Craigavon
- Old Park Interiors - Leeds
- Old Pine and Design - Ringwood
- Old Pine Antiques - Stafford
- Old Pine Furniture - Burgess Hill
- Old Pound Pottery - Axminster
- Old Road Securities Plc - Bedford
- Old Sarum Engineering - Salisbury
- Old Station Quarry - Somerton
- Old Swan Tile Warehouse Ltd - Liverpool
- Old Time Timber - Sudbury
- Old Town Bakery - Eastbourne
- Old Town Engineering Co. Ltd. - Swindon
- Old Town Eye Care - Swindon
- Old Town Farm - Newcastle
- Oldacres & Co. Ltd. - London
- Oldale Plastics - Sheffield
- Oldbury Aluminium Alloys Holdings Ltd. - Halesowen
- Oldbury Engineering Co. Ltd. - Horley
- Oldbury Howard Ltd - London
- Oldbury Plastics Ltd. - Tonbridge
- Oldbury Skip Hire - Oldbury
- Oldbury UK Ltd - Wolverhampton
- Oldbury Uk Ltd. - Wednesbury
- Oldco (4397580) Ltd. - Darwen
- Olde Co. Ltd - Huntingdon
- Olde Court Furniture Ltd. - London
- Olde Englande Reproductions Ltd - Stoke on Trent
- Olde English Paving - Halesowen
- Olde English Tiles - Hertford
- Olde English Window Co. Ltd. - Burnley
- Olde Forge Metalwork & Fabrication Co. Ltd. - Bradford
- Olde Potting Shed Co - Rowlands Gill
- Olde Worlde Oak Joinery Ltd - Stafford
- Olde Worlde Property Care - Aylesbury
- Oldeani Ltd. - Chelmsford
- Olden H G M - Romsey
- Oldershaw Brewery - Grantham
- Oldershaw Bros Ltd - Wigston
- Oldfield & Co - Coventry
- Oldfield Builders & Shopfitters Ltd - Sale
- Oldfield C & R - Bristol
- Oldfield E & E & Son - Wellingborough
- Oldfield Ellis Ltd - Kingston upon Thames
- Oldfield Machine Tools Ltd. - Glasgow
- Oldfield Road Service Station (Salford) - Salford
- Oldfield Watson Ltd. - Hebden Bridge
- Oldfields Ltd. - London
- Oldham - Hemel Hempstead
- Oldham & Manton Ltd. - Leicester
- Oldham Blinds - Oldham
- Oldham Bros Ltd. - Liverpool
- Oldham Cabinet Makers - Oldham
- Oldham Caravans - Manchester
- Oldham Controls - Oldham
- Oldham Crompton Batteries Ltd - Glasgow
- Oldham Electrical Ltd - Oldham
- Oldham Electroplating Co. Ltd. - Oldham
- Oldham Engineering Installations Ltd - Oldham
- Oldham Engineering Ltd - Oldham
- Oldham Garage Doors - Oldham
- Oldham J K - Leicester
- Oldham J S - Southport
- Oldham Lighting Ltd. - Leatherhead
- Oldham Optical UK - Scarborough
- Oldham Plant Hire & Sales Ltd - Oldham
- Oldham Powder Coaters - Oldham
- Oldham Power Tools Centre - Oldham
- Oldham Radiators Ltd. - Oldham
- Oldham Seals Ltd - Chichester
- Oldham Trade Plastics - Oldham
- Oldham Tyre and Exhaust Wholesale - Oldham
- Oldham Vending Services Ltd. - Oldham
- Oldland Builders & Co - Bristol
- Oldland Cnc Ltd. - Bristol
- Oldman & Routledge Homes Ltd - Lowestoft
- Oldrings Developments Kingsclere Ltd. - Newbury
- Oldroyd Associates - Alfreton
- Oldroyd Building & Design Ltd - Cleckheaton
- Oldroyd Investments Ltd - Cleckheaton
- Oldroyd Publishing Group - Lytham St Annes
- Oldroyds of Ossett Ltd. - Ossett
- Olds Demolition & Salvage Co - Exmouth
- Olds P R & E J & Son - Falmouth
- Olds W R E M & W L - Camborne
- Olds Welding Co - Dorchester
- Oldtown Joinery - Magherafelt
- Ole Elholm - Thetford
- OLE Ltd - Chichester
- Ole Wolff Electronics Ltd - Bedford
- Olema Engineering - Godalming
- Olenol Ltd - Congleton
- Oleo International Ltd - Coventry
- Oleo Solutions Ltd - York
- Oleotec Ltd - Ellesmere Port
- OLFA U.K. Absolutely Shaw Ltd - Driffield
- Olga Edwards Ltd - Hyde
- Olgelin Ltd. - Motherwell
- Oli's Fencing - Tonbridge
- Olicana Products Ltd - Ilkley
- Olicana Textiles Ltd. - Huddersfield
- Olicana Uk Ltd - Leeds
- Oliepops - London
- Oligarchy Ltd - Hertford
- Oliphant Bakers - Bo'ness
- Oliphant Developments Ltd - Southampton
- Oliphants Properties Ltd - Linlithgow
- Olivand Metal Windows Ltd. - London
- Olivari Uk Ltd. - Brentwood
- Olive & Padgett Ltd. - Heckmondwike
- Olive Branch Catering Equipment Ltd - Haverhill
- Olive Co-Operative - Todmorden
- Olive Domestic Metering Ltd - Abingdon
- Olive Grove Productions Ltd - Slough
- Olive Laces - Nottingham
- Olive Net Ltd - Plymouth
- Olive Personnel - London
- Olive Personnel (Uk) Ltd - London
- Olive Solutions - Manchester
- Olive Studios - Stockport
- Olive Translations Ltd - Birmingham
- Oliver & Co. - Witney
- Oliver & Cooksey Ltd. - Enfield
- Oliver & Robb Architects Llp - Dunfermline
- Oliver & Saunders Group Ltd. - Barnet
- Oliver & Son (Oxford) Ltd. - Oxford
- Oliver (Farms) Ltd. - Sudbury
- Oliver A T & Sons - Shefford
- Oliver Adams Ltd - Rugby
- Oliver Bros - Buxton
- Oliver Bros (Fish Merchants) Ltd. - Grimsby
- Oliver Burns Interiors - St Albans
- Oliver Clarke - London
- Oliver Connell & Son Ltd - London
- Oliver Construction (Groundwork Specialists) Ltd - Barnsley
- Oliver Cooper - Ipswich
- Oliver Crispin Robotics Ltd. - Bristol
- Oliver Designs Ltd - Ripley
- Oliver Douglas Ltd. - Leeds
- Oliver Farm Recycling Ltd - Stowmarket
- Oliver Forge & Brendan Lynch Ltd - London
- Oliver Goldsmith Eyewear Ltd - Borehamwood
- Oliver Green Ltd - Totnes
- Oliver Grey - Hungerford
- Oliver Harding Ltd. - Leicester
- Oliver Hare International - London
- Oliver Harry A - Newark
- Oliver I & Partners - Harrogate
- Oliver I G D Ltd. - Stockport
- Oliver James - Redditch
- Oliver James Associates Ltd - Manchester
- Oliver King - Ongar
- Oliver Lamps - Fakenham
- Oliver Liggins - Nottingham
- Oliver Marketing Ltd - London
- Oliver Middleton Architect - Leicester
- Oliver Nathan Precision Engineering - Wolverhampton
- Oliver Overhead Door Co. Ltd. - Brackley
- Oliver Pottery Co - Stone
- Oliver Priestley - Downpatrick
- Oliver R G & Son - Royston
- Oliver Rankin - Carshalton
- Oliver Scott Consulting Ltd. - London
- Oliver Signs - Dorchester
- Oliver T A - Morpeth
- Oliver Twists Threads Ltd. - Washington
- Oliver Valves Ltd. - Knutsford
- Oliver Ww Timber Merchant - Norwich
- Oliver Wyman Ltd. - London
- Oliver's Army Ltd - Worcester
- Oliver's Bakery - Withernsea
- Olivers Balloons - Leicester
- Olivers Blinds - Rochdale
- Olivers Building & Timber Merchants - Stanley
- Olivers Transport Ltd - Kelso
- Olives & Oils Ltd - Swansea
- Olives Et Al Ltd. - Sturminster Newton
- Oliveti Cubicles Ltd - Leicester
- Olivetti U K - Milton Keynes
- Olivetti Uk Ltd. - Milton Keynes
- Olivewood Ltd - Douglas
- Olivewood Ltd. - Edgware
- Olivia Scott - Chichester
- Olivia Gowns Designer Dressmaker - Chelmsford
- Oliviero N Davis - Newport
- Olivo UK Ltd - Northampton
- Ollands Ltd - Norwich
- Ollard Westcombe & Co. Ltd - Downpatrick
- Ollerton Engineering Services Ltd. - Preston
- Ollerton Fred A & Sons - Wigan
- Ollerton Ltd. - Huddersfield
- Ollett Plant Ltd - Norwich
- Ollie Campbell Creative Consultancy Ltd - Nottingham
- Olliedoo Wedjie Ltd. - Banbury
- Ollier C & J - Middlewich
- Olliver Communications - Godstone
- Olly's U.K. Ltd - Melksham
- Ollyswood Joinery - Pulborough
- OLMC Ltd - Wakefield
- Olmec Advanced Materials Ltd. - Sheffield
- Olmo Motors UK - Lincoln
- Olney Building & Maintenance Services - Olney
- Olney Headwear Ltd. - Luton
- Olney J & W A - Bedford
- Olney Pine and Picture Gallery - Milton Keynes
- Olney Precision Ltd. - Olney
- Ologic Ltd - Stone
- Ology Business Coaching - Chorley
- Ology Coaching - Warrington
- Olohan Fire - Milton Keynes
- Olorun Planning Partnership Ltd. - Honiton
- Olphert & Lambe Ltd. - Witney
- Olphert AW - Strabane
- Olro Group Sales & Marketing Ltd. - Romford
- Olsberg / Spi Ltd. - London
- Olsen & Co - Leicester
- Olsen Doors and Windows Ltd - Newark
- Olsen Engineering UK Ltd - Newtown
- Olsen Software Ltd - Swansea
- Olson Electronics Ltd - Stanmore
- Olson Lomas - Walsall
- Olson Projects Ltd - Lytham St Annes
- Olson Quality Foods - London
- Olsten (U.K.) Holdings Ltd - London
- Olsten Trout Ltd. - Louth
- Olt Consulting Ltd. - London
- Oltec Engineering Ltd - Birmingham
- Olternay Dye Services Ltd. - Halifax
- Olton Drinks Plus Ltd - Solihull
- Olton Skip Hire - Solihull
- Olton Transmissions - Birmingham
- Olus Environmental Ltd - Henfield
- Olver T R - Truro
- Olwald Record Plant Sales - Birmingham
- Olwyn Brush Manufacturers Kaye - Castleford
- Olwyn Fox (2000) Ltd. - Leeds
- Olymier Packaging Ltd - Nottingham
- Olympac Waste Systems - Bognor Regis
- Olympia Computers Systems - London
- Olympia Conference Centre - London
- Olympia Fabrications Ltd - Tipton
- Olympia Food Products - Plymouth
- Olympia Furniture Ltd - Ashton under Lyne
- Olympia Interiors Ltd. - Canterbury
- Olympia Testing (Holdings) Ltd. - Brierley Hill
- Olympia Travel - Wigan
- Olympia Triumph Manufacturing Ltd. - Swanage
- Olympiad Signs Ltd. - London
- Olympian Sheds - Sandbach
- Olympian Sheds Ltd. - Sandbach
- Olympian Software Ltd - Bath
- Olympic Automation - Burton on Trent
- Olympic Blinds Ltd. - Luton
- Olympic Chemical Systems - Hoddesdon
- Olympic Coachbuilders Ltd - Didcot
- Olympic Construction - Sidcup
- Olympic Conveyor Services Ltd - St Austell
- Olympic Cutting Formes Ltd. - Nottingham
- Olympic Electrical - Forest Row
- Olympic Embroidery Ltd. - Nottingham
- Olympic Fixing Products Ltd. - Accrington
- Olympic Fixings Ireland Ltd - Newtownards
- Olympic Glass Products - Queenborough
- Olympic Group Ltd - Rickmansworth
- Olympic Horse Feeds - Salisbury
- Olympic Lifts Ltd. - Lisburn
- Olympic Machinery Services Ltd - St Neots
- Olympic Marble - Peterborough
- Olympic Of Waterhouses Ltd - Stoke on Trent
- Olympic Oils Ltd - Liverpool
- Olympic Press Ltd. - Altrincham
- Olympic Print and Design - Edenbridge
- Olympic Shaver Centre Ltd - Nottingham
- Olympic Sign Services - Braintree
- Olympic Signs Ltd - Tunbridge Wells
- Olympic Staff Agency - London
- Olympic Supply Co. - Maidstone
- Olympic Training - Nottingham
- Olympic Varnish Co. Ltd. - Stroud
- Olympic Welding Ltd - Norwich
- Olympus (Ormskirk) Ltd - Ormskirk
- Olympus Automation Ltd. - Peterborough
- Olympus Construction (East Sussex) Ltd - Bexhill on Sea
- Olympus Construction Ltd - Bristol
- Olympus Construction Wessex Ltd. - Paignton
- Olympus Distribution Ltd - Tipton
- Olympus Engineering - Stoke on Trent
- Olympus Eyewear Ltd - Leicester
- Olympus Labels Ltd. - Pudsey
- Olympus Marquees Ltd - Berwick upon Tweed
- Olympus Pictures Ltd - Sevenoaks
- Olympus Products Ltd - Workington
- Olympus Technologies Ltd. - Huddersfield
- Olympus Tiles Ltd (Woodford Green) - Woodford Green
- Olympus Transmissions Ltd. - Wolverhampton
- Olympus Uk Ltd - Watford
- Olympus Uk Ltd. - London
- Om Group Ultra Pure Chemicals Ltd. - Alfreton
- OM Pimespo UK Ltd - Rugby
- Om Sportscars Ltd - Gloucester
- OM Support - Northwich
- OM2 Marketing - High Wycombe
- OMA UK Ltd - Congleton
- Oma's Ltd - Fareham
- Oma's Ltd. - Fareham
- Oma-Elite Windows Ltd - Omagh
- Omagh Enterprise Co. Ltd. - Omagh
- Omagh Minerals Ltd. - Omagh
- Omak Agencies Ltd - Belfast
- Omar Electrical Services - Douglas
- Omar Homes Ltd. - Brandon
- Omar S Chana - Southall
- Omar Skinner & Sons - Bracknell
- Omar Trading Co - Rochdale
- Omarno - London
- Omatics Ltd - Croydon
- Omawaste - Omagh
- Omax Corporation - Chester
- Omb Offshore Applications Ltd - Dundee
- Omb Services Ltd - Wakefield
- Omc Fluid Power Ltd. - Corby
- Omc Joinery Ltd. - Ilkeston
- Omc Plan Stairways Ltd. - Aberdare
- Omco Uk Ltd. - Pudsey
- Omedia Information Technology Ltd - London
- Omeg Ltd - East Grinstead
Omega (Roofing) Plastics Ltd - South Molton- Omega 4 - Shipley
- Omega Accountants, Registered Auditors - Croydon
- Omega Air Ltd - Douglas
- Omega Automotive Ltd - Lichfield
- Omega Blacksmiths - Glasgow
- Omega Building Construction (U K ) Ltd - London
- Omega Building Services Ltd. - Caterham
- Omega Business Solutions Uk Ltd - Prudhoe
- Omega Calibration Laboratories Ltd. - Chesterfield
- Omega Chrom - London
- Omega Citylifts Ltd. - Welwyn Garden City
- Omega Cleaning Contractors Ltd - Glasgow
- Omega Coach Travel - Leicester
- Omega Commercials Ltd - Bolton
- Omega Computers - Ilford
- Omega Computers Ltd. - Llanelli
- Omega Contractors (Leicester) Ltd - Leicester
- Omega Controls - Newark
- Omega Controls Ltd - Newark
- Omega Critical Care Ltd - Glasgow
- Omega Cubed Ltd. - Birmingham
- Omega Data Services Ltd - Aberdeen
- Omega Design Solutions UK Ltd - Dewsbury
- Omega Design U K Ltd. - Leeds
- Omega Diagnostics Ltd. - Alva
- Omega Digital Media Ltd. - Burgess Hill
- Omega Doors Ltd. - Preston
- Omega Efa Ltd. - Carnforth
- Omega Enclosures - Bangor
- Omega Engineering Ltd - Manchester
- Omega Engineering Services Ltd - Cheltenham
- Omega Environmental Technologies (Europe) Ltd. - London
- Omega Fine Chemicals Ltd - Salford
- Omega First Ltd. - Farnborough
- Omega Flex Ltd - London
- Omega Flex Ltd. - London
- Omega Foundry Machinery Ltd. - Peterborough
- Omega Furse Contracting (Bristol) - Bristol
- Omega Hair & Beauty - London
- Omega House Furniture - Thirsk
- Omega Ii Ltd - Derby
- Omega Interiors - Bridgend
- Omega Kitchens Direct Ltd - Lincoln
- Omega Laser Services - Sheffield
- Omega Laser Systems Ltd - Halstead
- Omega Lift Services Ltd - Edinburgh
- Omega Lighting Ltd. - Milton Keynes
- OMEGA Ltd - Burgess Hill
- Omega Mechanical Services Ltd. - Londonderry
- Omega Models - Glasgow
- Omega Models Ltd - Glasgow
- Omega Offset Ltd. - Newbury
- Omega Partitions Ltd. - Leeds
- Omega Partnership - Liverpool
- Omega Partnership Ltd. - Esher
- Omega Performance - London
- Omega Pistons Ltd. - Halesowen
- Omega Plant & Equipment Ltd - Stockport
- Omega Plastics - Blyth
- Omega Plc - Doncaster
- Omega Press - Chichester
- Omega Prime Ltd. - Wantage
- Omega Print & Design Ltd. - Stockport
- Omega Projects - Leeds
- Omega Red Group Ltd. - Nottingham
- Omega Research Ltd - Ely
- Omega Resistance Wire - Potters Bar
- Omega Resource Group Plc - Stonehouse
- Omega Resources Ltd - Alloa
- Omega Rho Ltd. - Bury
- Omega Safes Ltd (Nottingham) - Nottingham
- Omega Security Technics - Harrow
- Omega Services Ltd - Carshalton
- Omega Signs Ltd. - Leeds
- Omega Site Engineering Ltd - Haverhill
- Omega Spring Technology Ltd - Peterborough
- Omega Structures Ltd - Cheltenham
- Omega Supplies Ltd - Oldham
- Omega Supplies UK Ltd - Lincoln
- Omega Systems - Gloucester
- Omega Technical Services - Torquay
- Omega Technical Services Ltd. - Romney Marsh
- Omega Technical Supplies Ltd - Wrexham
- Omega Technologies Ltd. - Manchester
- Omega Tile Ltd - Redditch
- Omega Training Services - Birmingham
- Omega Valves - Westerham
- Omega Window Films - Whitchurch
- Omega Windows - Middlesbrough
- Omega Windows Doors and Conservatories - Margate
- Omega Workforce Ltd - Tewkesbury
- Omega Yarns Ltd - Loughborough
- Omega2 Web Design - Twickenham
- Omegaslate (UK) Ltd - Kidderminster
- Omerclass Ltd - Northwood
- Omersa & Co. Ltd. - Lincoln
- Omex - Dunfermline
- Omex (U K) Ltd. - Windsor
- Omex Agricultural Holdings Ltd. - Windsor
- Omex Agriculture Ltd. - Lincoln
- Omex Agrifluids Ltd - Kings Lynn
- Omex Environmental Ltd - Kings Lynn
- Omex Europe - Flint
- Omex Machines Europe Ltd - Flint
- Omeya International United Co. Ltd - Birmingham
- Omf Derek Cox Architects - Liverpool
- Omfarm Ltd. - Driffield
- Omfax Ltd. - Bicester
- OMG Continuous Ltd - Stoke on Trent
- Omg Services Ltd - Norwich
- Omg U K Ltd - Manchester
- Omi (Uk) Ltd. - Bradford
- OMI Architects - Falkirk
- Omi TV Services - Stevenage
- Omic (Europe) Ltd - Alfreton
- Omicity - Coventry
- Omicron (U K) Ltd - Buckingham
- Omicron Cutting Technology Ltd - Bristol
- Omicron Electronics UK Ltd - Stafford
- Omicron Ltd. - Ilford
- Omicron Nanotechnology Ltd - East Grinstead
- Omicron Research Ltd - Marlborough
- Omicways Ltd. - Bude
- Omiga Blinds - Chepstow
- Omiga Technology Ltd - Gloucester
- Omiran Ltd. - Bury St Edmunds
- Omitec Information Services Ltd - Witney
- Omitec Instrumentation Ltd - Devizes
- Omitec Resources - Coventry
- Omitech Information Services - Coventry
- Omj Petrochemical Services Ltd - Norwich
- Omk Design Consultancy Ltd - Cheltenham
- OML Ltd - Ashton under Lyne
- OMM Business Solutions Ltd - London
- Omneon Video Networks Inc - Tadley
- Omnex Profilm Ltd. - Stockport
- Omni - London
- Omni Colour Presentations Ltd. - London
- Omni Design International Ltd. - Solihull
- Omni Design Ltd - Cardiff
- Omni Direction (Uk) Ltd. - Derby
- Omni Distribution Ltd. - Blackburn
- Omni Flow Computers Ltd - Bracknell
- Omni Impex Ltd - Corby
- Omni Instruments - Dundee
- Omni Packaging - Belfast
- Omni Pc Ltd - Worcester
- Omni Pine & Cane Furnishing - Edinburgh
- Omni Resource Management Solutions Ltd. - Altrincham
- Omni Resources Ltd. - London
- Omni Sensors and Transmitters Ltd - Rugby
- Omni-Id Ltd - Farnham
- Omni-Pac U K Ltd. - Great Yarmouth
- Omni-Tech Electronics Ltd - Chesterfield
- Omnia (CS) Ltd - Nottingham
- Omnia at Tameway Tower - Walsall
- Omnia H V & Rail Ltd. - Uttoxeter
- Omnia Offices Ltd. - Sheffield
- Omnia Trading - Stowmarket
- Omniarc Ltd - Altrincham
- Omnibox Ltd - Chesterfield
- Omnibuild Ltd - London
- Omnibuild Sanitaryware Installation Co. Ltd - London
- Omnibus Arts - Chessington
- Omnibus Solutions Ltd. - Oldham
- Omnibus Systems Ltd. - Loughborough
- Omnicare Clinical Research Ltd. - Chippenham
- Omnichem Ltd. - Leicester
- Omnico Plastics (Christchurch) - Christchurch
- Omnico Plastics Ltd - Manchester
- Omnico Plastics Ltd (Northampton) - Northampton
- Omnico Plastics Ltd (St Leonards on Sea) - St Leonards on Sea
- Omnico Plastics Ltd. - Peterborough
- Omnicom It Services Ltd - Durham
- Omnicom Systems (Uk) Ltd. - Liverpool
- Omnicor - Richmond
- Omnifit Ltd - Cambridge
- Omniflex (U K) Ltd. - Stockport
- Omnifore Ltd. - Manchester
- Omniis Computer Support - Berkhamsted
- Omnikote Ltd - Aylesbury
- Omnipole (UK) Ltd - Croydon
- Omniprint - Market Harborough
- Omnipro Uk - Torquay
- Omnis Construction Ltd - Norwich
- Omnis Mechanical Services - Shaftesbury
- Omnis Partners - Glasgow
- Omnis Recruitment Ltd - Esher
- Omniscan - Wrexham
- Omnisew - Bristol
- Omnisew / Omnistitch - Bristol
- Omnisity Ltd - Kingswinford
- Omnitec - Douglas
- Omnitech Solutions Ltd. - Bristol
- Omnitest Ltd. - Wimborne
- Omnitrack (Ball Transfer Units) Ltd - Stroud
- Omnitrade Ltd. - Leicester
- Omnitronicservices - Rotherham
- Omniture Ltd - London
- Omnium IT Recruitment Ltd - Stoke on Trent
- Omnivision Ltd - Luton
- Omniwash UK - Hayes
- Omnix Software Ltd. - Bristol
- Omnova Wallcovering (U K) Ltd. - Hemel Hempstead
- Omonia Continental Patisserie - London
- Omos Ltd - Naas
- Omron Electronic Components Europe B.V. - Stevenage
- Omron Electronics Ltd - Milton Keynes
- Omron Healthcare U K Ltd. - Milton Keynes
- Omron Systems (N I) Ltd - Belfast
- Oms (Mobile Solutions) Ltd - Pudsey
- Oms (Uk) Ltd. - Stockport
- OMS Ltd - Coalville
- Omsbar Ltd - Abingdon
- Omser (Scotland) Ltd - Alexandria
- Omtl Realisations Ltd - Glasgow
- OMV (UK) Ltd - London
- Omv Ventura Tube Cutting Uk Ltd - Leicester
- Omw Hardware Ltd. - Rotherham
- Omx Securities Services Uk Llp - Birmingham
- Omya - North Ferriby
- Omya Ltd - Matlock
- Omya UK Ltd - Derby
- Omya UK Ltd - Dorking
- Omya Uk Ltd (Blaenau Ffestiniog) - Blaenau Ffestiniog
- On A Wick & A Prayer Ltd - Cardiff
- On Air Telecom Ltd. - Manchester
- On Assignment Lab Support - Warrington
- On Board Surface Mount Assembly Ltd - Darwen
- On Centre Surveys Ltd - Leamington Spa
- On Course - Shrewsbury
- On Course Matting Ltd. - Ellesmere
- On Demand Management Ltd. - London
- On Hold Communications - Croydon
- On Holiday Group - Crawley
- On Line Communications Systems - Amersham
- On Line IT Ltd/ Jetset online - Hitchin
- On Line Resources - Birmingham
- On Line Software - Haywards Heath
- On Line Systems (Northern) Ltd - Carlisle
- On Loan Recruitment Ltd. - Immingham
- On Location Conferences - London
- On Merit Ltd at Compton Paddock Laboratories - Thatcham
- On Q Ltd - Ingatestone
- On Reflection - Rye
- On Screen Productions Ltd - Chepstow
- On Show Exhibitions Ltd - Tarporley
- On Show Ltd - London
- On Sight - Sale
- On Sight It Ltd - Shrewsbury
- On Sight Ltd. - London
- On Site Bodies - Bury
- On Site Mobile Paint Sprayers - Christchurch
- On Site Pc Repairs - Castleford
- On Site Recruitment Ltd - Bedford
- On Site Safety Solutions Ltd - Llantwit Major
- On Site Services - Leicester
- On Site Services (Gravesend) Ltd. - Gravesend
- On Site Services Management Ltd - Stoke on Trent
- On Site Supplies - Romford
- On Site Tyre Services (Scotland) Ltd. - Glasgow
- On Site Welding & Engineering Co. Ltd. - Bridgend
- On Spring - Leeds
- On Tap Services - Slough
- On Target Recruitment Ltd. - Surbiton
- On The Dot Courier - Shipston on Stour
- On The Edge Events Paintball Site - Macclesfield
- On the Level - Leighton Buzzard
- On the Level It - Chelmsford
- On the Level Property Services Ltd. - Leighton Buzzard
- On the Phone Media Ltd - Banbury
- On the Spot Cleaning Supplies Ltd - Guildford
- On the Spot Signs - Bristol
- On the Spot Welding Ltd - Weymouth
- On the Table Ltd - Weymouth
- On the Tiles - London
- On the Tiles ( Import ) Ltd - Southampton
- On the Video Front - Bath
- On Time - York
- On Time Communications Ltd - High Wycombe
- On Time Joinery Ltd. - London
- On Time Office Solutions Ltd - Leeds
- On Time Secure Destruction & Recycling Ltd - Caerphilly
- On Top Webdesign Ltd. - Manchester
- On Track Design - Wisbech
- On Track Productions Ltd - Worksop
- On Track Recruitment & Training Ltd - Farnham
- On-A-Hill Garage - Ilfracombe
- On-Going Innovation Ltd - Swansea
- On-Line (Malvern) Ltd - Malvern
- On-Line Coding Ltd - Reading
- On-Line Computers Ltd - York
- On-Line Computing - Hull
- On-Line Engineering Services Ltd - Brighton
- On-Line Marketing & Sales Ltd - Redditch
- On-Screen Designs Ltd. - Dundee
- On-Set Location Services Ltd. - Royston
- On-Site Assessments Ltd. - Washington
- On-Site Investigations Ltd. - Wirral
- On-Site Recruitment Solutions Ltd - Southsea
- On-Site Welding Ltd - Leamington Spa
- On-the-Level Surveying Supplies - Pontefract
- On-the-line - High Peak
- On-Time Electronics & Entertainments Ltd. - Leicester
- ON2NET (Uk) - Cannock
- ON3 Ltd. - Stonehouse
- On365 Ltd - Loughborough
- Onaek Building Consultants Ltd - Durham
- Onair Services (U K) Ltd. - Ilford
- Onalytica Ltd - London
- Onboard Electronics Ltd - Aldermaston
- Onboard Energy - Nuneaton
- Onc Computers Ltd - Jarrow
- Once upon A Stamp - Chesterfield
- Onclick Ltd. - Tonbridge
- Oncology Imaging Systems Ltd. - Uckfield
- Oncology Systems Ltd - Shrewsbury
- Oncoprobe Ltd. - Manchester
- Oncore IT - London
- oncoreIT - London
- Oncosense Ltd. - Cambridge
- Ondeo Industrial Solutions - Gateshead
- Ondine Ltd. - East Grinstead
- Ondrives Ltd - Chesterfield
- Onduline Building Products Ltd. - London
- One & Only Ltd. - London
- One 17 Ed (Education) Ltd - Huddersfield
- One 17 S D (Structural Design) Ltd. - Huddersfield
- One 2 Many - London
- One 3 One - Dorking
- One 4 All Trades Ltd - Sutton Coldfield
- One 8 Six Ltd. - London
- One Another Ltd - London
- One Bill - Peacehaven
- One Brand Group - Bristol
- One by One (Wigston) - Wigston
- One by One Originations - Rowlands Gill
- One Call Communications - Catterick Garrison
- One Call Equipment Hire - Rochester
- One Call Hire Ltd. - Enfield
- One Call Ltd - Perth
- One Call Recruitment Ltd. - Peterborough
- One Call Training Ltd - Derby
- One Can Help PC Problem Solving - Heathfield
- One Car One (Warrington) - Warrington
- One Centre - Hastings
- One Click Computing Ltd - Derby
- One Click It Ltd - Bolton
- One Complete Solution - Truro
- One Creations Ltd - Hoddesdon
- One Degree Consulting Ltd - Romford
- One Dental Ltd - Rugby
- One Design - Crediton
- One Earth Events Ltd - Burnley
- One Event Solutions - York
- One Eyed Monster Production - London
- One for Instrumentation Ltd - Congleton
- One Good Idea Ltd - Glasgow
- One Green Bottle Ltd - Hove
- One Hat Design Ltd - Witney
- One Headmaster - Birmingham
- One Holding Ltd - Bristol
- One Hour Dental Repairs - Birmingham
- One Hundred Percent Glass - London
- One Knight Famous Bar Hire - Winchester
- One Man & His Digger - Dudley
- One Man & His Digger - Sidmouth
- One Media (Scotland) Ltd - Glasgow
- One North East Development Board - Newcastle upon Tyne
- One Off - Dover
- One Off Engineering - Barnsley
- One Off Engineering Ltd. - Hyde
- One Off Neon Creations - London
- One Offs Ltd. - Liverpool
- One On Rail Engineering - Sutton Coldfield
- One One Three Consulting Ltd - London
- One One Three Consulting Ltd (Amersham) - Amersham
- One Optical Ltd. - Glasgow
- One Optical Opthalmic Lens Division Ltd. - Glasgow
- One Portfolio Management Ltd - Crawley
- One Recruitment Associates - Airdrie
- One Shot Products Ltd. - Hull
- One Sixty Six Recruitment - Rochester
- One Smart Recruitment Agency Ltd. - Marlow
- One Source Telecom Ltd - Coventry
- One Step Joinery Ltd. - Swindon
- One Step Technology - Cobham
- One Stop Asbestos Consultants & Services Ltd - Bolton
- One Stop Automation Ltd - Witney
- One Stop Bar & Catering Supplies Ltd. - Birmingham
- One Stop Build Shop Ltd - Saffron Walden
- One Stop Construction Group Ltd - Leicester
- One Stop Convenience (Derby) - Derby
- One Stop Data Ltd. - Epsom
- One Stop Festival - Kimbolton
- One Stop IT Ltd - Haywards Heath
- One Stop Joinery Ltd - Crawley
- One Stop Managed Waste Solutions - Sheffield
- One Stop Medical Centre - Coventry
- One Stop Metals & Plastics - Oldham
- One Stop Mobility Ltd. - Woking
- One Stop Office Supplies Ltd. - Edinburgh
- One Stop Plastics - Melton Mowbray
- One Stop Promotions - Northampton
- One Stop Promotions (Leicester) Ltd - Leicester
- One Stop Promotions Ltd. - Loughborough
- One Stop Property Maintanance - Royston
- One Stop Resource Centre - Sale
- One Stop Sealing Ltd - Hull
- One Stop Security Services Ltd - Sale
- One Stop Shop Awnings - Reading
- One Stop Solution - Caldicot
- One Stop Solutions - Glenrothes
- One Stop Supplies Ltd - London
- One Stop Tack Shop - East Molesey
- One Stop Waste Solutions - Aberdeen
- One Stop Water-Jet Ltd. - Hull
- One Technology - Bungay
- One to One - Godstone
- One to One Computer Tuition - Luton
- One to One General Services Ltd - Borehamwood
- One to One Office Solutions Ltd. - Godstone
- One to One Personnel Ltd - Southend on Sea
- One to One Recruitment Ltd - Gloucester
- One Touch Solutions (Uk) Ltd. - Guildford
- One Two Tree - Norwich
- One Up Display Service Ltd - London
- One Use Medical - Romford
- One Vision Eyecare Ltd. - Milton Keynes
- One Vision Ltd - Cambridge
- One Vision TV - Leicester
- One Way Circuits Ltd - Norwich
- One Way Resourcing Ltd - Fareham
- One Week Windows - Godalming
- One World Recruitment Ltd - Nottingham
- One World Telecommunications Ltd. - Rochdale
- One-Tech (Uk) Ltd. - London
- One-Thirty Litho Ltd. - Teddington
- ONE2CREATE Ltd - Flint
- one2one Financial Recruitment Ltd - Kettering
- one2one Financial Recruitment Ltd - Northampton
- ONE4WINE Ltd - London
- Onebigstar - Nottingham
- Onecnc UK - Kingswinford
- Onefourdesign - Signs and Graphics - Slough
- Onegate - Rbs Ltd - Penarth
- Oneida International Ltd. - London
- Oneida Plastics Ltd - North Shields
- Oneida Viviers Ltd. - Milford Haven
- Oneil & Goldie - Glasgow
- Oneodoram Engineering Ltd. - Norwich
- OneOne2 Media - Marden
- Oner Signs & Leisure - Cardiff
- Ones and Zeros - Leicester
- Onesbeck on Wheels - Bedlington
- Onestep Solutions (Resources) Ltd. - Benfleet
- Onestop - Liverpool
- Onestop Recruitment - London
- Onestop Safety Systems Ltd. - Glasgow
- Onestop Testing Services - Bognor Regis
- Onestopcomputers (Stoke) Ltd - Stoke on Trent
- OneStopHire.com Ltd - Wigan
- Onestoplaptop - Chester
- Onestyle Ltd - London
- Onesys - York
- Onetran Ltd - Middlesbrough
- Onetruesaxon Ltd - London
- Onevoice Research - Sale
- Onform (Dies) Ltd. - Basildon
- Ongar Enterprises Ltd - Ongar
- Ongar Medical Ltd. - Woking
- Ongor Plating Service - Ongar
- Ongropack U K Ltd - Croydon
- Oni Plc - Luton
- Onink Ltd. - Renfrew
- Onion Skins - Nottingham
- Onions D M & C L - Nottingham
- Onions P J - Newark
- Onionsoft Ltd - Swadlincote
- Oniron Ltd - London
- Onisoft Uk Ltd - Middlesbrough
- Onison - Romney Marsh
- Onity Ltd. - Liverpool
- Oniva Ltd - Bembridge
- Onix (Marketing) Ltd. - Bourne
- Onix Holdings Ltd - Winsford
- Onkyo Europe Electronics Gmbh - Beaconsfield
- Online Architects Ltd - Cannock
- Online Architects Ltd. - Wolverhampton
- Online Associates - Bolton
- Online AV Ltd - Swadlincote
- Online Baits UK - Chelmsford
- Online Bottlers Ltd. - Middlesbrough
- Online Catering Ltd. - London
- Online Catering Services - Clitheroe
- Online CCTV - Birmingham
- Online Coating Ltd. - Bristol
- Online Computer Developments Ltd. - Glasgow
- Online Computers - Eastbourne
- Online Design Direct - Liverpool
- Online E Recruitment Ltd - Twickenham
- Online Electrical - Bexley
- Online Electronics Ltd - Aberdeen
- Online Engineering Ltd - Blaydon on Tyne
- Online Engineering Systems Ltd - Stonehouse
- Online Envelopes Ltd - Dunstable
- Online Ergonomics Ltd - Lowestoft
- Online Furnace Services Ltd - Greenock
- Online Job Match Ltd - Fareham
- Online Lubricants Ltd - Barking
- Online Marketing Co - Ely
- Online Media - Carlisle
- Online Packaging (2) Ltd - Wakefield
- Online Packaging Ltd. - Gloucester
- Online Packaging Shop - Portslade
- Online Payrolls Ltd. - Bournemouth
- Online Pc Support Ltd - Eastleigh
- Online Plant - Alfreton
- Online Plumbing Services - Abbots Langley
- Online Research Solutions Ltd - Basingstoke
- Online Resourcing Group Ltd - Leeds
- Online Rewards Ltd - Dunfermline
- Online Roadways - Dagenham
- Online Security Products - Leeds
- Online Supplier Zone - Grantham
- Online Support Computing Ltd - Brentford
- Online Systems (Northern) Ltd - Carlisle
- Online Systems UK Ltd - Nottingham
- Online Trading Solution - Tewkesbury
- Online User Guides Ltd. - Worcester
- Online Warehouse Ltd. - Ware
- Online Works Ltd - Stockport
- Online World Ltd. - Northampton
- Online-Recruit Net - Glasgow
- Online-Up Aviation Personnel - Horsham
- Online-Up Ltd. - Horsham
- Onlinecarvalues Com - Solihull
- Onlinelocum.Co.Uk Ltd - London
- Onlink Consultants Ltd. - Larne
- Onlitech Ltd - Hungerford
- Only Bathrooms Ltd - Bristol
- Only Marketing Jobs - Sevenoaks
- Only Medics Ltd - Farnham
- Only Natural - St Helens
- Only Natural Products Ltd - Horsham
- Only Oz - London
- Only Pets & Horses - Llandysul
- Onnekas Ltd. - Ascot
- Onny Developments Ltd. - Craven Arms
- Ono Pharma Uk Ltd. - London
- Onono Co Ltd - Glasgow
- Onpar Golf Ltd - Norwich
- Ons Ltd - Surbiton
- Onser UK Ltd - Smethwick
- Onshore Recruitment Ltd - Poole
- OnSite - Walsall
- Onsite Builders (Scotland) Ltd. - Dundee
OnSite Central Ltd - Wantage- Onsite Communications Ltd - St Neots
- Onsite Computer & Network Support Services - Haywards Heath
- Onsite Computer Solutions Ltd - Birkenhead
- Onsite Computer Training - Shrewsbury
- Onsite Contractors Ltd. - Harrow
- Onsite I T Ltd. - Maldon
- Onsite Insights Ltd - Hayling Island
- Onsite IT Ltd - Maldon
- Onsite Mechanical Services Ltd - Newport
- Onsite Partnership Ltd. - Market Harborough
- Onsite Pm - Colchester
- Onsite Services - Southampton
- Onsite Services - Waterlooville
- Onsite Solution Services Ltd - London
- Onsite Trailer Services - Swadlincote
- Onsitetools - Fordingbridge
- Onspec Optical Co. Ltd - Sunderland
- Onspec Oscillators Ltd. - Nuneaton
- Onstream Computing Ltd - Tranent
- Ontap.ie - Cork
- Ontelligence - High Wycombe
- Ontex Healthcare Uk Ltd. - Corby
- Ontheweb - Hitchin
- Ontime Automotive (Volume Distribution) Ltd - Queenborough
- Ontime Automotive Ltd - Southam
- Ontime Building Contractors Ltd - London
- Ontime Logistics Ltd (Leicester) - Leicester
- Ontime Systems Ltd. - Aylesbury
- Ontop Pelmet Design Ltd. - Harrogate
- Ontop Tractors Ltd - Perth
- Ontrack International Ltd. - Bishops Stortford
- Ontrak Services - Wigan
- Ontrak Uk Ltd - London
- Ontraq Ltd - Chelmsford
- Onus Technologies - Weymouth
- Onward Fabrications Ltd. - Willenhall
- Onward Fishing Co. Ltd. - Aberdeen
- Onward Fuels(Scotland) Ltd - Glasgow
- Onward Marketing Ltd. - Stockport
- OnwardsUpwards - Brighton
- Onwatch (Uk) Ltd. - Crowborough
- Onyett Farms Ltd. - Huntingdon
- Onyvax Ltd. - London
- Onyx Contractors Ltd - Bishop Auckland
- Onyx Conversions - Barnsley
- Onyx Cosmetics Ltd - Manchester
- Onyx Group Ltd - Middlesbrough
- Onyx Holdings Ltd. - South Petherton
- Onyx Internet Ltd - Middlesbrough
- Onyx Land Technologies Ltd. - Walsall
- Onyx Leigh Environmental Ltd. - Sheffield
- Onyx Management Ltd - London
- Onyx Prompting Ltd - Sunbury on Thames
- Onyx Recruitment Associates Ltd. - Luton
- Onyx Scientific Ltd. - Sunderland
- Onyx Total Waste Management - Walsall
- Onyx Uk - Norwich
- Onyxcol Ltd. - Slough
- Oocl (Uk) Ltd. - Ipswich
- Ooh It Ltd - Morden
- Oolithica (Geoscience) Ltd. - Aberdeen
- Oomers Ltd. - London
- Oona Kay Nightwear - Nottingham
- Oops Has the Answer Ltd - Stoke on Trent
- Oorana - Dorchester
- Op Business Services Ltd. - Crawley
- OP-TEC Systems Ltd - Telford
- Opace Technology Solutions - Birmingham
- Opagus Marketing Ltd. - Neath
- Opal Dreams Designs - Grays
- Opal Envelopes Ltd. - Wolverhampton
- Opal Food Processing Systems Ltd. - Huntingdon
- Opal Group Ltd - Sevenoaks
- Opal Management Consultancy - Caerphilly
- Opal Marine - Gosport
- Opal Oil Price Assessments - Wood Mackenzie - Edinburgh
- Opal Print - Bristol
- Opal Recruitment Ltd. - Fareham
- Opal Refurbishment Ltd - Sidcup
- Opal Services Ltd - Camberley
- Opal Signs Ltd. - Borehamwood
- Opal Skip Hire - Wolverhampton
- Opal Span Ltd. - Crewe
- Opal Teeth Whitening - Hamilton
- Opal Telecom - Warrington
- Opalcrown Ltd. - Bristol
- Opale Management Services Ltd. - Sandhurst
- Opalion Plastics Ltd - Coatbridge
- Opalion Plastics Ltd. - Baldock
- Opallake Engineering Ltd. - Dartford
- Opalrange Recruitment Consultancy Ltd/Contract Services - Welwyn Garden City
- OpalTec International Ltd - Bristol
- Opas (Southern) Ltd. - Worthing
- Opas I T Ltd. - London
- Opcare Ltd - Belfast
- Opco(Uk) Ltd. - London
- Opcom Research Ltd - Kings Lynn
- Opec Plc - Bray
- Opecsystem Ltd - Buckingham
- Opel Contractors - Nottingham
- Opel Print Services Ltd - Stockport
- Opella Ltd - Hereford
- Open Access Ltd - Leiston
- Open Answers Ltd - Harrow
- Open Automation & Control Ltd - Mitcham
- Open Box Publishing Ltd. - Birmingham
- Open Business Systems Ltd. - London
- Open Communications International Ltd - Leiston
- Open Computer Solutions Ltd - Wallingford
- Open Computing Ltd (Derby) - Derby
- Open Connections Solutions Ltd. - Bristol
- Open Date Equipment Ltd - Mitcham
- Open Design Ltd. - Chorley
- Open Eye Marketing - Ivybridge
- Open Fencing - Nottingham
- Open File - Lewes
- Open Frontiers Ltd - Newmarket
- Open G I Ltd. - Worcester
- Open Golf Club Competitions Ltd - Market Rasen
- Open Hosting Ltd - Manchester
- Open House Preston Unemployed Resource Centre - Preston
- Open House Products Ltd. - Birkenhead
- Open Image Ltd - Market Harborough
- Open International Ltd - Worcester
- Open Logic Solutions Ltd. - Worcester
- Open Logistics Ltd. - Harrogate
- Open Logistix Systems - Stoke on Trent
- Open Minded Solutions Ltd - Darlington
- Open Minds Consultants Ltd. - Evesham
- Open Minds Consulting Ltd. - Conwy
- Open Minds High Availability Solutions - Sutton Coldfield
- Open Networks Engineering Ltd. - Bishops Stortford
- Open Partnership Solutions Ltd - Bristol
- Open Platform Ltd - Edinburgh
- Open Projects Ltd - Nottingham
- Open Range Covers - Rickmansworth
- Open Reality - Abingdon
- Open Reality Ltd - Abingdon
- Open Road Recruitment Ltd - Rugby
- Open Sandwich Design - Sandwich
- Open Seas (U K) Ltd. - Abingdon
- Open Solutions Technologies Ltd - Stalybridge
- Open Space - House Extensions Ltd - London
- Open Spaces Ltd - Chertsey
- Open Systems Professional Services Ltd. - Oldham
- Open Systems Recruitment Ltd - Watford
- Open Technologies Ltd - Southampton
- Open Technology - Burgess Hill
- Open Telecom International Ltd. - Wadebridge
- Open World Ltd - Bath
- Open Zone Ltd - Oxted
- OpenAir - Crewe
- Openconnect (Ireland) Ltd - Carrickfergus
- Opencontact Direct Marketing Ltd. - Norwich
- Opencto Ltd - Attleborough
- Openda Ltd - Swindon
- Opendemocracy Ltd. - London
- Openfern Ltd - London
- Openfield Agriculture Ltd - Grantham
- OpenGlobal IT - Gloucester
- Openhouse Europe Ltd - Newcastle under Lyme
- Opening Doors Lewisham Business Advisory Service - London
- OpenIP Ltd - Bolton
- Openip Ltd. - Bury
- Openit (Uk) Ltd - Chippenham
- Openlink Group Ltd - Croydon
- Openpsl Ltd. - Leeds
- Openscope Ltd. - Stanmore
- Opensense Ltd - Solihull
- Opensense Ltd. - Solihull
- Openserve - Bracknell
- Openshaw Joinery - Manchester
- Openshaw Radiator Services - Hyde
- Openshaws - London
- Opensoft Systems Ltd - Knaresborough
- OpenSpace Solutions Ltd - Ringwood
- Openstudio Architects Ltd. - London
- Openthorpe Engineering Ltd. - Wednesbury
- Opentrack Ltd - Middlesbrough
- Openview Group Ltd - Romford
- Openxtra Ltd - Otley
- Opera Bespoke - London
- Opera Holdings Ltd - Leamington Spa
- Operandi Ltd - Croydon
- Operando Ltd - Stevenage
- Operational Command Training Organisation Ltd - Chester
- Operational Support Ltd - Chesterfield
- Operational UK Ltd - Runcorn
- Operations Support (Software) Ltd - Cranleigh
- Operon - London
- Operon Ltd - Edinburgh
- Opex Exhibition Services Ltd. - Newport
- Opex Industrial Supplies Llp - Aberdeen
- Opex Ltd. - Dunbar
- Ophthalmedex Ltd - London
- Ophthalmic Technologies Ltd - Worthing
- Opiah Systems Ltd. - Newbury
- Opico Ltd. - Bourne
- Opie & Peacock - Northallerton
- Opie A T & Y J - Liskeard
- Opin Systems Ltd. - Glasgow
- Opinion Leader Research Ltd. - London
- Opinion Research - Manchester
- Opinion Research Services Ltd. - Swansea
- Opinionpanel Ltd - London
- OpiusDesign Ltd - London
- Opkinson Wastes - Chesterfield
- OPM Creator Ltd - Wednesbury
- OPM Furniture Ltd - London
- OPM Group - Keighley
- Opm Response Ltd. - Colchester
- OPP Ltd - Oxford
- Oppello - London
- Oppello Ltd - London
- Oppello Ltd. - Redhill
- Opperman Mastergear Ltd. - Newbury
- Oppo Complete Building Services Ltd - Bristol
- Opportunity Centre - Kirkcaldy
- Opportunity Europe Ltd - Rochester
- Opra Packaging Ltd. - Walsall
- Oprima Ltd. - Oxford
- Opro Ltd. - Hatfield
- Opsa House Business Centre - York
- OPSC Ltd - Wantage
- Opsis Executive Search Ltd. - London
- Opsis Visuals Ltd - Stockport
- Opsol UK Ltd - Cramlington
- Opt Out Engineering Ltd. - Bristol
- Opt-A-Vision - Dagenham
- OPT4MOBILITY Ltd - Teddington
- Optaglio Ltd. - Andover
- Optanin Specas - Derby
- Optare Group Ltd. - Leeds
- Optare Uk Ltd. - Blackburn
- Optech Fibres Ltd - Barrow in Furness
- Optech Microscope Services Ltd - Thame
- Optek Ltd. - Abingdon
- Optelec Ltd. - Watford
- Optelma Lighting (U K) Ltd. - Abingdon
- Optex (Europe) Ltd. - Maidenhead
- Opti Space Ltd. - Alnwick
- Opti-cal Survey Equipment Ltd - Reading
- Optibelt (U K) Ltd - Warrington
- Optic Illusion Ltd (Haverfordwest) - Haverfordwest
- Optic Lighting Ltd - Clitheroe
- Optic Lighting Ltd - Nelson
- Optica Security Systems Ltd. - Pudsey
- Opticaid U K Ltd - Leeds
- Optical & Hearing - Sutton Coldfield
- Optical Activity Ltd. - Huntingdon
- Optical Alliance Ltd. - Abertillery
- Optical Choice Ltd. - Wirral
- Optical Coating Technologies Ltd - Tamworth
- Optical Communication Services Ltd. - Immingham
- Optical Digital Media Ltd. - Blyth
- Optical Disc Services Ltd. - Lutterworth
- Optical Express - Cumbernauld
- Optical Express - Glasgow
- Optical Express - Lichfield
- Optical Express (Northern) Ltd - Glasgow
- Optical Express (Southern) Ltd - Greenock
- Optical Express (Southern) Ltd - Manchester
- Optical Express (Westfield) Ltd (Dumbarton) - Dumbarton
- Optical Fibres (UK) Ltd - Morecambe
- Optical Filters Ltd. - Thame
- Optical Fx - Northampton
- Optical Glass Accessories - Wadebridge
- Optical Instruments (Balham) Ltd. - Croydon
- Optical Investments Ltd. - Colwyn Bay
- Optical Laboratories U K - Northolt
- Optical Marketing Ltd. - London
- Optical Marketplace Ltd. - Chorley
- Optical Metrology Centre - Bishops Stortford
- Optical Outlook Ltd. - Shipley
- Optical Products Ltd. - London
- Optical Sciences Ltd. - Northampton
- Optical Services - Milton Keynes
- Optical Services (Blackpool) Ltd. - Blackpool
- Optical Shop of Aspen Europe - London
- Optical Support Ltd. - London
- Optical Surfaces Ltd. - Kenley
- Optical Technology - London
- Optical Technology Training Ltd - Skipton
- Optical Test & Calibration Ltd. - Bradford
- Optical Thin Films Ltd. - Didcot
- Optical Vision Ltd. - Bury St Edmunds
- Optical Works Ltd. - Newquay
- Optical World 2000 Ltd. - Barking
- Optical World Shepards Bush Eye Centre - London
- Opticare Opticians Ltd - Largs
- Opticast Ltd - Redditch
- Opticast Ltd. - Walsall
- Opticheck Ltd - Stourbridge
- Optichic - London
- Optichrome Computer Systems Ltd. - Woking
- Optichrome Ltd - Woking
- Optician - Sutton
- Opticians - Wigan
- Opticians Express - Nelson
- Optico Ltd. - Hitchin
- Opticolour - Bath
- Opticon Ltd. - Luton
- Opticon U K Ltd - Rugeley
- Opticron - Gillingham
- Optics Elite Ltd - Manchester
- Opticus - Glasgow
- Optident White Ltd - Ilkley
- Optigene Ltd - Horsham
- Optigraph - Dartford
- Optik Leisure Ltd - Stone
- Optika Ltd - London
- Optikinetics Ltd. - Luton
- Optilabs (Croydon) - Croydon
- Optilan UK ltd - Coventry
- Optilink Ltd - Pinner
- Optilock Ltd - Doune
- Optim - Glenrothes
- Optim Management Ltd. - London
- Optima - London
- Optima Computer Centre Ltd. - London
- Optima Computer Solution - Bridgend
- Optima Connections Ltd. - Beaconsfield
- Optima Consulting Partners Ltd. - Guildford
- Optima Control Solutions Ltd - Blackburn
- Optima Design Associates Ltd - Mansfield
- Optima Diagnostics Ltd - London
- Optima Fire Consultants Ltd. - Stourbridge
- Optima Global Solutions Ltd - Milton Keynes
- Optima Health Ltd. - Cardiff
- Optima International Ltd - Doncaster
- Optima Low Vision Services Ltd. - Totnes
- Optima Manufacturing Jewellers Ltd. - Birmingham
- Optima Office Supplies Ltd. - Barnsley
- Optima Products Ltd - Bath
- Optima Research Ltd - Stansted
- Optima Search Ltd. - Pulborough
- Optima Site Solutions Ltd. - Hampton
- Optima Solutions Uk Ltd. - Aberdeen
- Optima Stainless - Kings Lynn
- Optima Training (UK) Ltd - Newark
- Optima Warehouse Solutions Ltd - Crewe
- Optima:RM Ltd - Warrington
- Optimad Media Systems Ltd - London
- Optimal Armour Ltd - Dudley
- Optimal Industrial Automation Ltd - Bristol
- Optimal Knowledge Ltd - Aberdeen
- Optimal Media - London
- Optimal Process Technology Ltd. - Christchurch
- Optimal Services Ltd - London
- Optimal Staffing Ltd - Reading
- Optimal Technologies Ltd. - Baldock
- Optimation Ltd - Ilkeston
- Optimation Ltd. - Haltwhistle
- Optimax Consultancy Ltd - Uxbridge
- Optimax Consulting Ltd. - Sevenoaks
- Optimax Imaging Inspection and Measurement Ltd - Northampton
- Optimax Ltd. - Halesowen
- Optime Lighting Ltd. - Hitchin
- Optimec Ltd - Malvern
- Optimech - Blackburn
- Optimed Ltd. - Coventry
- Optimim - Llandysul
- Optimim Ltd - Llandysul
- Optimisations - Manchester
- Optimise Consultancy Ltd. - Stone
- Optimise Outsourced Business Development Ltd. - Berkhamsted
- Optimised Energy Solutions Ltd - Ellesmere Port
- Optimised Engineering Ltd. - Chipping Norton
- Optimised Operations Ltd - Rugby
- Optimised Power Controls Ltd - Ashton under Lyne
- Optimize Search Engine Marketing - London
- Optimize Space - Wetherby
- Optimized Systems Ltd. - Huddersfield
- Optimizer Ltd - Nottingham
- OPTIMO - London
- Optimol Ltd. - Shotts
- Optimum - Cheadle (Cheshire)
- Optimum Brasses - Tiverton
- Optimum Business Supplies (Derby) Ltd - Derby
- Optimum Cartridge Co - Sheffield
- Optimum Coatings Ltd. - Morecambe
- Optimum Computer Maintenance Ltd. - Eastleigh
- Optimum Connections Ltd. - Wokingham
- Optimum Conservatory Roofing Ltd - Bolton
- Optimum Construction Ltd - Wokingham
- Optimum Consulting Services Ltd - York
- Optimum Control pro Software - Launceston
- Optimum Controls Services Ltd - Ipswich
- Optimum Data Ltd - Birmingham
- Optimum Developments (Barnstaple) Ltd - Barnstaple
- Optimum Engineering Ltd - Hemel Hempstead
- Optimum Group Services Plc - Greenford
- Optimum International 2000 Ltd. - York
- Optimum It Plc - Bromley
- Optimum Mobility Ltd - Malmesbury
- Optimum Nationwide - Milton Keynes
- Optimum Oils Ltd. - Gloucester
- Optimum Outlook Ltd - London
- Optimum Packaging Ltd - Wisbech
- Optimum Personnel - Liverpool
- Optimum Plumbing & Heating Ltd. - Peterborough
- Optimum Potential Ltd - Ascot
- Optimum Precision Engineering Ltd - Ely
- Optimum Recruitment Services Ltd. - Hatfield
- Optimum Sales Results Ltd. - Belper
- Optimum Storage Systems Ltd - Halifax
- Optimum Surveyor Management Ltd - Fareham
- Optimum Systems Ltd. - Doncaster
- Optimum Time - Peterborough
- Optimum Underfloor Heating - Inverness
- Optimum Workspace Furniture Ltd - Sevenoaks
- Optimum Workspace Ltd - Sevenoaks
- Optimum-Multimedia.Co.Uk - Wirral
- Optimus (Aberdeen) Ltd - Aberdeen
- Optimus Consultants (Uk) Ltd - London
- Optimus Consultants Ltd - London
- Optimus Consultants Ltd. - Kettering
- Optimus Events Ltd. - Ringwood
- Optimus Group Ltd - Woking
- Optimus Homes Ltd - Middlesbrough
- Optimus Media Ltd - Sale
- Optimus Precision Engineering Ltd - Nelson
- Optimus Recruitment - Jersey
- Optimus Recruitment Ltd - Leeds
- Optimus Uk Ltd. - Kenilworth
- Optimx Ltd - Brentwood
- Optimx Ltd. - Billericay
- Option Hygiene Ltd. - Nelson
- Option Systems Ltd. - Leicester
- Option Technologies Europe Ltd. - Rossendale
- Option X Business Support Ltd - Ilkeston
- Optionfact Ltd. - Stocksfield
- Options - Poole
- Options (Scotland) Ltd. - Livingston
- Options 4 U Ltd - Poole
- Options Au Pair Agency - Leatherhead
- Options Employment Ltd - Hounslow
- Options Fr Ltd. - Wallington
- Options Furniture (Uk) Ltd. - Mitcham
- Options Management Ltd - Newcastle
- Options Manufacturing Ltd - St Leonards on Sea
- Options of Barry Ltd. - Barry
- Options Promotional Bags - Manchester
- Options Recruitment (Scotland) Ltd - Dunfermline
- Options Technology Ltd - London
- Optionweb Analysts Ltd - Southall
- Optipharm Recruitment Ltd. - Birmingham
- Optiplan Fine Handmade Kitchens (Basingstoke) - Basingstoke
- Optiplan Kitchens (Wimborne) - Wimborne
- Optiquality Ltd - Southport
- Optique - Thornton Heath
- Optique Solutions Uk Ltd - Derby
- Optis Europe Ltd. - Grimsby
- Optisave Express - Farnham
- Optisavers Ltd - Liverpool
- Optisavers Ltd (Altrincham) - Altrincham
- Optisense Ltd. - Horsham
- Optisoft Ltd. - York
- Optivision (Yorkshire) Ltd. - Ossett
- Optivite Ltd - Retford
- Optivote Ltd - Otley
- Optivote Ltd. - Otley
- Optix Fire and Security 24/7 Ltd - Stevenage
- Optix Online Ltd - York
- Optix Wholesale Blinds - Hull
- Opto International Ltd. - Stalybridge
- Optocap Ltd. - Livingston
- Optoelectronic Manufacturing Corporation (UK) Ltd - Redruth
- Optoelectronics Research Center - Southampton
- Optom Shop Ltd - Lossiemouth
- Optoma Europe Ltd. - Watford
- Optometric Technology Group Ltd. - London
- Optomo Ltd. - Manchester
- Optoplast Export & Import Agents - Oldham
- Optoplast Manufacturing Co Ltd - Liverpool
- Optos Plc - Dunfermline
- Optosci Ltd. - Glasgow
- Optosource - Ulverston
- Optree Computers - Letchworth
- Optrex Europe Uk - Rochester
- Optronics Ltd - Guernsey
- Optrys Ltd - Cambridge
- Optum Systems Ltd - London
- Optus Resin Technology Ltd. - Wirral
- Optyma Security Systems Ltd. - Welling
- Opulence - Bingley
- Opulent Computers - Leeds
- Opus - Caerphilly
- Opus 10 Ltd. - Corsham
- Opus 2 - Carshalton
- Opus 4 Integrated Ltd - Warwick
- Opus 4 Logistics Ltd - Hyde
- Opus 59 Ltd - Witney
- Opus 7 - Bexleyheath
- Opus Agencies Ltd - Corby
- Opus Air Conditioning (Sales) Ltd. - Dartford
- Opus Appointments Ltd. - York
- Opus Architects - Enniskillen
- Opus Audio Developments Ltd - Launceston
- Opus Building Services Ltd - Boldon
- Opus Career Management Ltd - London
- Opus Chartered Surveyors - Birmingham
- Opus Creates - Towcester
- Opus Creative Design Ltd - Knutsford
- Opus Energy Ltd - Northampton
- Opus Engineering Services Ltd. - Lowestoft
- Opus Enterprises Ltd - Leighton Buzzard
- Opus Glass Design - Bristol
- Opus Group, The - Belfast
- Opus H C L Ltd - Bristol
- Opus International Consultants (Uk) Ltd - Manchester
- Opus International Consultants (Uk) Ltd - Wrexham
- Opus International Consultants Holdings (Uk) Ltd. - London
- Opus Joynes Pike Ltd - Doncaster
- Opus Magnum Ltd. - London
- Opus Maxim Ltd. - Guildford
- Opus Metrology Ltd - Corby
- Opus Mitchell Ltd - Tewkesbury
- Opus Plastics Ltd - Exeter
- Opus Pro-Audio - Burnley
- Opus Psychology Practice Ltd - Birmingham
- Opus Resourcing Ltd. - Beckenham
- Opus Scientific Ltd. - Broxbourne
- Opus Screenprint Ltd. - Bournemouth
- Opus Signs Ltd. - Hertford
- Opus Staff Ltd - Belfast
- Opus Stained Glass - Brighton
- Opus Telecom - Alton
- Opus Telecom (Bucks) - Amersham
- Opus Telecom Ltd - Belper
- Opus Trust Marketing Ltd. - London
- Opus Vl Internet Linux Solutions - Rugby
- Opus-Uk Ltd - Sheffield
- OPUSalbums.com - Rochester
- Ora Ceramics Ltd - Dalkeith
- ORA Lighting - London
- Ora Ltd - London
- Ora Technologies - Bristol
- Orac Communications Ltd - Stourbridge
- Oracle Business Information - London
- Oracle Components Ltd - Harlow
- Oracle Corporation UK Ltd - Cheadle (Cheshire)
- Oracle Corporation UK Ltd - Edinburgh
- Oracle Corporation UK Ltd - Reading
- Oracle Drive Systems Ltd. - Batley
- Oracle Interiors Ltd - Salisbury
- Oracle Internet - Burnley
- Oracle Safety Associates Ltd - Nottingham
- Oracle Safety Consultants Ltd - Wakefield
- Oracle Solutions UK Ltd - Northampton
- Oracle Storage Systems - Reading
- Oracle Storage Systems - Reading
- Oracle Vision Ltd - Wakefield
- Oracle-Rescue.Com - Royston
- Oracstar Ltd - Northampton
- Oraica Ltd. - Wrexham
- Orakel Ltd - Ruthin
- Orakon Ltd. - Derby
- Oral-B Laboratories Ltd - Isleworth
- Oraldent Ltd. - Huntingdon
- Oralgate Ltd. - Sheffield
- Oralnet Ltd - Tadcaster
- Oram & Ward Marquee Services - Bridgend
- Oram Furniture Ltd. - Whitchurch
- Oram Kevin J - Beccles
- Oram Professional Audio - Gravesend
- Oram W D - Norwich
- Orama Fabrications - Alfreton
- Orama Fabrications - Shildon
- Oranda Design - Abertillery
- Orandown Ltd - Croydon
- Orange & Blue Recruitment Ltd - Bristol
- Orange Advertising Ltd. - London
- Orange Box Designs Ltd. - Bristol
- Orange Bus IT - Newcastle upon Tyne
- Orange Business Services - London
- Orange Chemicals Ltd. - Winchester
- Orange County Ltd - Spennymoor
- Orange Engineering Ltd - Derby
- Orange Environmental Building Services Ltd. - Fleet
- Orange Eyewear Ltd - Salford
- Orange Fox Ltd - Oxford
- Orange Frog Design Ltd - Harpenden
- Orange Group - Fleet
- Orange Hut Solutions Ltd - Coventry
- Orange Information Systems Ltd. - Stourbridge
- Orange Instruments Ltd. - Northampton
- Orange Mountain Bikes Ltd. - Halifax
- Orange PCS Ltd - Bristol
- Orange Plant - Warrington
- Orange Tree Trading - Evesham
- Orangeade Ltd. - Leicester
- Orangeaid Ltd. - Wellingborough
- OrangeBlack - London
- Orangebox Ltd. - Hengoed
- Orangeburst Ltd. - Brighton
- Orangeleaf Systems Ltd - Shrewsbury
- Orangepanda - Chester le Street
- Orangepeel Design Ltd - Macclesfield
- Orangevalley Systems Ltd - Stroud
- Orangutan - Warlingham
- Orangutan Tropical Peatland Research Project - Cambridge
- Oranjepcs.Co.Uk - Northolt
- Oranmore Consulting Ltd - Croydon
- Oranvale Ltd - Bury
- Oranworth Ltd - Southampton
- Orapi Applied Ltd. - Smethwick
- Orapi Ltd. - Bradford
- Orb Data Ltd - Slough
- Orb Engineering - Motherwell
- Orb Jewellery Ltd - Knutsford
- Orb Recruitment Ltd - Stockport
- Orbach & Chambers Services Ltd. - London
- Orbell Associates - Pudsey
- Orbic Bearings Ltd. - Croydon
- Orbik Electronics Ltd. - Walsall
- Orbinox UK - Chichester
- Orbis Consumer Products Ltd - London
- Orbis Digital Ltd - Glasgow
- Orbis Property Protection - Rotherham
- Orbis Property Protection Ltd - Belfast
- Orbis Property Protection Ltd - Glasgow
- Orbis Resourcing Ltd. - Reading
- Orbis Software Ltd. - Poole
- Orbiso Global - London
- Orbison Products Ltd. - Gillingham
- Orbit - Leicester
- Orbit Apparel Ltd - St Albans
- Orbit Bearings and Transmission Ltd - Cradley Heath
- Orbit Business Solutions Ltd. - Portsmouth
- Orbit Coaches - Coalville
- Orbit Construction - Cardiff
- Orbit Design & Build Co. Ltd. - Shepton Mallet
- Orbit Developments (Manchester) Ltd. - Alderley Edge
- Orbit Digital - Corsham
- Orbit Digital Solutions Ltd - East Grinstead
- Orbit Imperial Lubricants - Stockton on Tees
- Orbit Imports/Exports Ltd - Ramsgate
- Orbit Information Systems Ltd. - Altrincham
- Orbit International Plc - Birmingham
- Orbit Internet Ltd. - Lytham St Annes
- Orbit IT Services Ltd - Southport
- Orbit Office Supplies - Birmingham
- Orbit Precision Ltd. - Redditch
- Orbit Pumps Ltd. - Manchester
- Orbit Pvc Centre - Bargoed
- Orbit Research Ltd - Bradford
- Orbit Satellite Installations Ltd - Preston
- Orbit Services 2000 Ltd. - Leeds
- Orbit Suracing Contractors - Wednesbury
- Orbit Uk Ltd - Batley
- Orbit UK Ltd - Manchester
- Orbital Computer Services - Canterbury
- Orbital Consulting Ltd. - Hoddesdon
- Orbital Container Services Ltd - Douglas
- Orbital Contractors Ltd. - Liverpool
- Orbital Distribution Ltd - Plymouth
- Orbital Epos Systems Ltd - Ruislip
- Orbital Epos Systems Ltd - Warminster
- Orbital Equipment Ltd. - Waltham Abbey
- Orbital Fabrications Ltd - Huntingdon
- Orbital Fasteners Ltd - Watford
- Orbital Fire Protection - Liverpool
- Orbital Foods Ltd. - Bury St Edmunds
- Orbital Gas Systems Ltd - Stone
- Orbital Global Ltd. - Purley
- Orbital Hygiene Services Ltd - Wickford
- Orbital Marketing Services Group - Ashford
- Orbital Property Services Ltd. - Glasgow
- Orbital Recruitment - Mansfield
- Orbital Recruitment Derby Ltd - Derby
- Orbital Response and Fulfilment - Ashford
- Orbital Signs Ltd. - Watford
- Orbital Sound Ltd. - London
- Orbitals New Media - Bristol
- Orbitec Ltd - Derby
- Orbiter Food Machinery Ltd. - Nottingham
- Orbitline Ltd. - Bath
- Orbitpress Ltd - Chesham
- Orbiweld (Uk) Ltd - Chelmsford
- Orbsen Consulting - Dungarvan
- Orbstar Ltd - Northampton
- Orby Engineering Ltd. - Craigavon
- Orca Book Services Ltd. - Poole
- Orca Electronics - Wisbech
- Orca Logic Ltd. - Dorking
- Orca Man Ltd. - Glasgow
- Orca Mining (Mexico) Ltd - London
- ORCA Promotions - Cambridge
- Orca Southwest Clutches - Launceston
- Orca Technology Ltd - Broadstone
- Orca Websites Ltd - Leeds
- Orcaline Ltd - Slough
- Orcar Pet Foods - Milton Keynes
- Orcas Systems Ltd. - Belfast
- Orchard & Heroes Recruitment - Watford
- Orchard (Developments) Holdings Plc - Mansfield
- Orchard Agency the - Leeds
- Orchard Associates - Harrow
- Orchard Associates Uk Ltd - Woking
- Orchard Bay Associates Ltd - Watford
- Orchard Blinds (Southsea) Ltd - Portsmouth
- Orchard Blinds and Curtains - Bexleyheath
- Orchard Bps Materials Ltd - Horsham
- Orchard Business Support - Gloucester
- Orchard Business Systems Ltd - Altrincham
- Orchard Communications Ltd - Woking
- Orchard Computer Services - Bristol
- Orchard Construction - Cranbrook
- Orchard Construction Ltd - Hook
- Orchard Consulting - Haywards Heath
- Orchard Consulting (Gb) Ltd. - Hook
- Orchard Control Engineering - Diss
- Orchard Controls Ltd. - Crawley
- Orchard County Chemicals - Armagh
- Orchard Data Services Ltd - Bromley
- Orchard Developments (East Anglia) Ltd. - Diss
- Orchard Developments (Uk) Ltd - Wilmslow
- Orchard Drawing Boards Ltd. - Wakefield
- Orchard Electronics - Hailsham
- Orchard Electronics (Computer Specialists) Ltd - Tamworth
- Orchard Environmental Systems - Wolverhampton
- Orchard Environmental Water Services Ltd - Rochester
- Orchard Fasteners Ltd - Craigavon
- Orchard Fencing (Welling) - Welling
- Orchard Fisheries - Sturgeon & Koi Foods - Lancing
- Orchard Fisheries - Sturgeon & Koi Foods - Lancing
- Orchard Foam Packaging Ltd. - Crumlin
- Orchard Foods - Enniskillen
- Orchard Fruit Wine - Wetherby
- Orchard Growth Partners Ltd - London
- Orchard Heroes - Enfield
- Orchard Hill Machinery - Andover
- Orchard Hire and Sales Ltd - Cheltenham
- Orchard Homes & Developments Ltd. - Southampton
- Orchard Homes (Scotland) Ltd - Salford
- Orchard Homes (Scotland) Ltd. - Looe
- Orchard Homes Ltd - Preston
- Orchard House Foods Ltd. - Corby
- Orchard Housecare - Huntingdon
- Orchard I T Ltd - Bristol
- Orchard Ian P C - Dunstable
- Orchard Industrial Ltd - Bury St Edmunds
- Orchard Installations - Bristol
- Orchard John & Co - Redruth
- Orchard Materials Ltd. - Bristol
- Orchard Medical Recruitment Ltd. - London
- Orchard Mobility - Taunton
- Orchard Nurseries (Terrington) Ltd. - Wisbech
- Orchard Paper Ltd - Harlow
- Orchard Partners - London
- Orchard Partners London Ltd - London
- Orchard Plant Hire - Wellingborough
- Orchard Press (Cheltenham) Ltd. - Tewkesbury
- Orchard Press Ltd - Swindon
- Orchard Print & Design Ltd. - Stourbridge
- Orchard Process Controls - Brixham
- Orchard Professional Computer Services Ltd. - Mitcheldean
- Orchard Recruitment - Douglas
- Orchard Recruitment - Royston
- Orchard Recruitment Ltd - Liphook
- Orchard Recruitment Partnerships - Watford
- Orchard Refrigeration Ltd - Armagh
- Orchard Resourcebase Ltd - Thirsk
- Orchard Soft Furnishings - Lymm
- Orchard Stone - Worcester
- Orchard Street Furniture - Wallingford
- Orchard Toys - Nottingham
- Orchard Training - Guildford
- Orchard Transport Co. Ltd - Solihull
- Orchard Two Ltd - Bootle
- Orchard Vinyl Graphics - Northampton
- Orchard Windows - Gillingham
- Orchardlea Foods - Exeter
- Orchestrand Ltd. - Leeds
- Orchid Bridal Ltd. - Hinckley
- Orchid Business Computing Ltd. - Derby
- Orchid Computers Ltd - Solihull
- Orchid Designs Ltd - Huddersfield
- Orchid Dry Cleaners & Laundry - Wrexham
- Orchid Engineering - Burnley
- Orchid Environmental Ltd - Chorley
- Orchid Homes Ltd - Scunthorpe
- Orchid Information Systems Ltd - Royston
- Orchid Interiors - Wakefield
- Orchid International Ltd - Willenhall
- Orchid Kitchens Ltd - Horley
- Orchid Metal Ltd - Leicester
- Orchid National Nursing Supply - Bedford
- Orchid Packaging - Wigan
- Orchid Plastics Ltd. - Callington
- Orchid Software Ltd - Newcastle upon Tyne
- Orchid Video Ltd. - Bristol
- Orchids by Post Ltd - Feltham
- Orchidwood Mushrooms Ltd. - Rye
- Orchiston Clinical Ltd - Uxbridge
- Orchman Contractors - Chislehurst
- Orcina Ltd. - Ulverston
- Orco - Edinburgh
- Ord Storage Services Ltd - Inverness
- Ord Technology Ltd - Driffield
- Orde M W - Morpeth
- Ordee Repro - Manchester
- Ordens Farms Ltd - Banff
- Order of Service - Bury St Edmunds
- Ordercrave Ltd. - Lowestoft
- Orderexit Ltd. - Horsham
- Orderly Mind Ltd - Exeter
- Orderpower Ltd. - Wigan
- orderTalk - Tonbridge
- Ordnance Survey - Belfast
- Ordnance Survey - Kings Lynn
- Ordnance Survey Local Offs (Chorley) - Chorley
- Ordnance Survey Ltd. - Southampton
- Ordon Management Services Ltd - Bristol
- Ordon Management Services Ltd. - Cheltenham
- Ordprint Ltd. - Hartlepool
- Ore Sizer (Uk) Ltd. - Clevedon
- Ore-An Ltd. - Brighouse
- Oreanda Ltd - London
- Orefelt Associates - London
- Orega (Holdings) Ltd - London
- Orega (Staines) Ltd. - Staines
- Oregon Scientific (U K) Ltd. - Maidenhead
- Oregon Timber Frame Ltd. - Selkirk
- Orelia Ltd - Manchester
- Orems@Hotmail Com - Tring
- Oreon Upholstery - Braintree
- Orestone Services Ltd. - Newton Abbot
- Oreton Building Supplies - Kidderminster
- Oreton Building Supplies (Ludlow) - Ludlow
- Orexis - London
- Orexis Fresh Foods Ltd. - London
- Orexport (U K ) Ltd. - London
- Orfeur Timber Ltd - Great Yarmouth
- Orford Marine Services - Woodbridge
- Orford Plant Hire - Bromsgrove
- Orford Plant Hire - Cwmbran
- Organ Design & Construction Ltd. - Surbiton
- Organic Cotton - Machynlleth
- Organic Development Ltd - Exeter
- Organic Digital - Glasgow
- Organic Farm Foods Fruit Ltd - Evesham
- Organic Guitars Ltd - March
- Organic Herb Trading Co - Taunton
- Organic Partners Ltd - Taunton
- Organic Power Ltd - Templecombe
- Organic Recyling - Peterborough
- Organic Resource Agency Ltd - Malvern
- Organic Resource Management Ltd. - London
- Organic Specialities (A division of Thomas Swan and Co Ltd) - Leicester
- Organica (U K) Ltd - Birkenhead
- Organically Coated Steel - Kidderminster
- Organico Ltd - Somerton
- Organics Ltd - Coventry
- Organisation & People Development Ltd - Leamington Spa
- Organisational & Personal Development Consultants Ltd. - Sherborne
- Organised Computer Systems Ltd. - Billingshurst
- Organix Brands Ltd. - Christchurch
- Organo (UK) Ltd - Horsham
- Organo Fresh - Omagh
- Organon Laboratories Ltd - Motherwell
- Orgapack - Stafford
- Orgtel Ltd - London
- Oriana & Co. - Gravesend
- Oriana and Company - Gravesend
- Orica Blast & Quarry Surveys Ltd - Lisburn
- Orica UK Ltd - Wigan
- Orican Ltd. - Bristol
- Oriel Architecture Ltd - Sturminster Newton
- Oriel Blinds - Ebbw Vale
- Oriel Design Ltd - Cardiff
- Oriel Design Partnership - Cardiff
- Oriel International Trading Ltd - London
- Oriel Lubricants Ltd - Omagh
- Oriel Metal Co. Ltd - West Wickham
- Oriel Printing Co. Ltd. - Hull
- Oriel Project Services (Scotland) Ltd - Perth
- Oriel Selection - Fleet
- Oriel Studios - Bootle
- Oriel Systems Ltd - Chippenham
- Oriel Windows - Leamington Spa
- Oriella Ltd - London
- Orien Contracts Ltd - Sawbridgeworth
- Orient Design Ltd. - London
- Orient Direct Ltd. - Manchester
- Orient Engineering & Services Consultant Ltd - London
- Orient Marble Exports Ltd - Douglas
- Orient Overseas Container Line (Europe) Ltd - Ipswich
- Orient Press - Bradford
- Orient Trade - London
- Oriental Ambitions Ltd - Bath
- Oriental Arts - Saltburn by the Sea
- Oriental Bakeries Ltd - Birmingham
- Oriental Computers - London
- Oriental Contracting Co. Ltd - London
- Oriental Delight - Wembley
- Oriental Enterprises Ltd - London
- Oriental Motor (Uk) Ltd. - Basingstoke
- Oriental Oversea Container Lines - Ipswich
- Oriental Press (U K) Ltd. - London
- Oriental Security Systems Ltd. - Liverpool
- Oriental Spices - Grimsby
- Oriental Style Ltd - Christchurch
- Oriental Traders - Coleraine
- Oriental Traders - West Bromwich
- Oriental Weavers Uk Ltd - Milton Keynes
- Orientrose Contracts Ltd. - Huntingdon
- Oriflame Direct - Northampton
- Oriflame U K Ltd - Milton Keynes
- Origin (Bristol) Ltd - Bristol
- Origin 1 (Uk) Ltd. - Watford
- Origin 3 Ltd - Bristol
- Origin Creative Solutions Ltd - Worthing
- Origin Data Realisation Ltd. - Nottingham
- Origin Design Consultants - Calne
- Origin Direct - Carlisle
- Origin HR - London
- Origin Legal Ltd - Colchester
- Origin Leisure Ltd. - Uxbridge
- Origin Live Ltd - Southampton
- Origin Media Ltd - Brighton
- Origin Precision Mouldings Ltd. - Glasgow
- Origin Product Design Ltd. - Huntingdon
- Origin Recruitment Ltd - Lancaster
- Origin Structures Ltd - York
- Original Additions (Beauty Products) Ltd. - Hayes
- Original Bathrooms Ltd. - Richmond
- Original Bedstead Co Ltd - Corby
- Original Blues Clothing Co Ltd - Hayes
- Original Business Print - Mitcham
- Original Club Fenders Ltd - Nottingham
- Original Creations - Rotherham
- Original Emblems - Airdrie
- Original Engineering Solutions Ltd. - Derby
- Original Fabrics Ltd. - Nelson
- Original Features (Restorations) Ltd. - London
- Original Fireplace Company - London
- Original Forgery Ltd. - Tiverton
- Original Homes Ltd - Leek
- Original Kitchens & Bedrooms - Bolton
- Original Landscape Design Nurseries - Colchester
- Original Leisurewear Ltd. - Leicester
- Original Marketing - Bridlington
- Original Metal Craft & Fabrication - Bewdley
- Original Minds - London
- Original Oak - Heathfield
- Original Products (Marylebone) Ltd. - Amersham
- Original Stone Concept - Harrow
- Original Style - Plymouth
- Original Style Factory Shop (Gloucester) - Gloucester
- Original Style Ltd. - Exeter
- Original Tile Co - Edinburgh
- Originalartsales.Co.Uk Ltd - Preston
- Originals - Diss
- Origins - Bath
- Origma Ltd - Enfield
- Origo Services Ltd. - Currie
- Oriium Consulting Ltd - Harrogate
- Orim - Brighton
- Orima Ltd - London
- Orinoco Ltd. - Leeds
- Orinol Ltd - Blackpool
- Orint Ltd. - London
- Orion - London
- Orion - D Gow and Son - Lybster
- Orion Access Services Ltd. - Erith
- Orion Air Conditoning and Refrigeration Ltd - Bedford
- Orion Alloys Ltd. - Harlow
- Orion Audio Visual - Kings Langley
- Orion Automation Ltd - Huntingdon
- Orion Books Ltd - London
- Orion Business Centres Ltd. - Stamford
- Orion Cleaning Co Ltd - Sutton Coldfield
- Orion Clinical Services Ltd. - Slough
- Orion Clothing - Rochdale
- Orion Confectionery (International) Ltd. - Horley
- Orion Construction Ltd. - Tamworth
- Orion Consultancy Services Ltd - Inverness
- Orion Designs (U K) Ltd. - Hornchurch
- Orion Developments Ltd. - Wakefield
- Orion Devices Ltd. - Norwich
- Orion Display - Basildon
- Orion Electric (U K) Ltd. - Port Talbot
- Orion Electrotech Ltd - Reading
- Orion Electrotech Ltd. - Aylesbury
- Orion Engineering Ltd. - Nantwich
- Orion Engineering Services Ltd - Aberdeen
- Orion Engineering Services Ltd - Inverness
- Orion Farming Group Ltd - Abingdon
- Orion Fashions - Stoke on Trent
- Orion Finance & Leasing Ltd. - Macclesfield
- Orion Flowers - Wantage
- Orion Gems - Glasgow
- Orion Group - Aylesbury
- Orion Group Uk Ltd - Newcastle upon Tyne
- Orion Homes Ltd. - Wakefield
- Orion Industries Ltd. - High Wycombe
- Orion Insulations (Bradford) - Bradford
- Orion Insulations (Manchester) - Manchester
- Orion Investments Ltd. - Morden
- Orion Laminating - Croydon
- Orion Leadcraft - Banbury
- Orion Leasing Holdings Ltd. - London
- Orion Manufacturing Ltd - Stowmarket
- Orion Media Marketing Ltd - Brentford
- Orion Medical Products Ltd. - London
- Orion Molecular Services Ltd - Manchester
- Orion Omnibus Coach/Bus Hire - Greenock
- Orion Optics - Crewe
- Orion Packaging & Sales - Belfast
- Orion Packaging Ltd. - Neston
- Orion Packaging Machinery Ltd - Burntwood
- Orion Paints Ltd. - Liverpool
- Orion Pharma (U K) Ltd. - Newbury
- Orion Power Systems Ltd - Edinburgh
- Orion Precision - Basildon
- Orion Precision Castings Ltd. - Hayle
- Orion Professional Services Ltd - Aylesbury
- Orion Project Services - Glenrothes
- Orion Project Services - Purley
- Orion Project Support Resources Ltd. - Irvine
- Orion Projects Ltd. - Saltash
- Orion Resourcing Ltd - Aylesbury
- Orion Safety Belts Ltd. - Stevenage
- Orion Sbd Ltd - Hexham
- Orion Security Print Ltd. - Ilkeston
- Orion Shoes Ltd. - Leicester
- Orion Signs - Accrington
- Orion Storage Solutions Ltd - Abertillery
- Orion Systems Ltd - Ashby de la Zouch
- Orion Technology - Warrington
- Orion Telecom Ltd - Rochester
- Orion Textiles - Basildon
- Orion Transmission Ltd. - Warrington
- Orion Trent (High Wycombe) - High Wycombe
- Orion Trent Holdings Ltd. - Sheffield
- Orion Trent Ltd (Sheffield) - Sheffield
- Orion Valves Ltd - Wimborne
- Orion Valves Ltd. - Reading
- Orion Web Technologies Ltd - Redditch
- Orion Windows - Harrogate
- Orion Windows Ltd - York
- Orion-Link Ltd. - Cradley Heath
- ORION8.Com - Glasgow
- Oriona Ltd - Birmingham
- Orionesque Ltd. - Bournemouth
- Orior by Design Ltd. - Newry
- Oris Uk Ltd - Bolton
- Oritech Ltd - Ongar
- Orium Interiors Ltd - Northwood
- Orix Consultancy Services Ltd - Reading
- Orkin Ltd. - Wembley
- Orkney Aggregates Ltd - Orkney
- Orkney Boats (Holdings) Ltd. - Arundel
- Orkney Delivery Services - Kirkwall
- Orkney Herring Co Ltd - Orkney
- Orkney Line Ltd - Kirkwall
- Orkney Marine Hatcheries Ltd. - Orkney
- Orkney Meat Ltd - Orkney
- Orkney Optical Laboratory - Orkney
- Orkney Seaweed Co. Ltd - Orkney
- Orkney Select Ltd - Orkney
- Orkney Today - Orkney
- Orkney Tool Hire - Kirkwall
- Orkney Water - Orkney
- Orkneyweddings R Us Ltd. - Orkney
- Orkot Composites (Rotherham) - Rotherham
- Orla Solutions (Uk) Ltd - Maldon
- Orlando Building Services - Nottingham
- Orlap Ltd. - Buxton
- Orlestoneoak Ltd - Aylesford
- Orli's - London
- Orlight Ltd - London
- Orlight Ltd - Potters Bar
- ORLIN Technologies Ltd - Bedford
- Orlin Technology Ltd - Dublin
- Orlock Ltd. - Ballynahinch
- Orman Engineering - Coventry
- Ormandy Ltd. - Halifax
- Ormau Joinery - Belfast
- Ormco Europe Bv - Peterborough
- Orme Computing Ltd - Liverpool
- Orme Creative Ltd - Bicester
- Orme-Smith Partnership - Oakham
- Ormeau Enterprises Ltd. - Belfast
- Ormerod International Ltd. - Ware
- Ormerod J - St Leonards on Sea
- Ormerods Ltd. - Rochdale
- Ormiston Wire Ltd - Isleworth
- Ormond Aluminium Ltd. - Gloucester
- Ormond Construction (UK) Ltd - London
- Ormond Farm Partnership - Swindon
- Ormonde Construction Ltd - Sunderland
- Ormonde Joinery Products Ltd. - Surbiton
- Ormonvine Ltd. - Bridgend
- Ormrod & Partners - Liverpool
- Ormrod Diesels - Skelmersdale
- Ormrod Electric Ltd - London
- Ormrod J D V - Thatcham
- Orms Designers + Architects Ltd. - London
- Ormsby of Scarisbrick Ltd. - Ormskirk
- Ormsby Sporting Services Ltd. - Louth
- Ormskirk & District General Hospital - Ormskirk
- Ormskirk Aerials - Ormskirk
- Ormskirk Beds & Prams - Ormskirk
- Ormskirk Oils Ltd. - Ormskirk
- Ormskirk Windows and Joinery - Ormskirk
- Ormston Associates Ltd - Lincoln
- Ormston Technology Ltd. - Beverley
- Ormwood Homes Ltd. - Accrington
- Ornamantel Ltd. - London
- Ornament Express - Birmingham
- Ornamenta Ltd. - London
- Ornamental Cast Iron Ltd - Portsmouth
- Ornamental Designs - London
- Ornamental Garden Products - Ellon
- Ornamental Gates - Burton on Trent
- Ornamental Iron Ltd - Barry
- Ornamental Ironwork - Ashton under Lyne
- Ornamental Ironwork - Bridlington
- Ornamental Metals - Kirkcaldy
- Ornamental Plants Ltd. - Preston
- Ornamental Plaster Design Ltd - Ashton under Lyne
- Ornat Iron Company - Tadcaster
- Ornate Designs Ltd - Droitwich
- Ornate Fountain & Statue Co. - Mansfield
- Ornate Plaster - Basildon
- Ornate Products - Woking
- Ornate Wrought Ironworks - Barnsley
- Ornum Technical Services Ltd. - Aberdeen
- Oro Computers - Bournemouth
- Oro Ltd - Leeds
- Orocco Pier - South Queensferry
- Orolia Global Services Ltd - Basingstoke
- Oromed U K Ltd. - Gerrards Cross
- Orostream Air Conditioning Ltd - Crowborough
- Orp Ltd. - Banchory
- Orphans Press Ltd - Leominster
- Orpheus Books Ltd - Witney
- Orpington (Joinery) Ltd. - Orpington
- Orpington Building & Decorating Contractors - London
- Orpington Caravan Centre Ltd. - Orpington
- Orpington Mini Skips - Orpington
- Orpington Shop Mobility - Orpington
- Orpington Timber & Building Supplies Ltd. - Bexleyheath
- Orpington Tp (Orpington) - Orpington
- Orpwood Associates - London
- Orpwood Ltd. - Wantage
- Orr Pollock & Co. Ltd. - Greenock
- Orr Bros - Londonderry
- Orr John S - Downpatrick
- Orr L & D - Bathgate
- Orrel Turner Interiors - Bradford
- Orrell Construction Services Ltd - Bolton
- Orrell Filtration Ltd. - Stalybridge
- Orrell Plant Sales Ltd - Newton le Willows
- Orrell Windows Ltd. - Wigan
- Orridge and Co Ltd - Harlow
- Orris Systems Ltd - Huddersfield
- Orrmac Coatings Ltd. - Sheffield
- Orrock Plant Hire - Forfar
- Ors Recruitment - Northwich
- ORS Scaffolding - Romford
- ORS UK Ltd - Burton on Trent
- Orsborn Construction Consultants - Ely
- Orscheln Europe - Rugby
- Orseal Ltd - Bolton
- Orso Ltd - London
- Orso Wine Agencies - Basingstoke
- Ort (Thread Rolling) Ltd. - Chesterfield
- Ortak Jewellery Ltd - Orkney
- Ortec Ltd - Guernsey
- Orteguil (U K ) Ltd. - Stockport
- Ortek Graphics Ltd. - Walsall
- Orthene Chemicals Ltd. - Harrow
- Ortho Express Investments Ltd - Great Missenden
- Ortho Express Ltd - Great Missenden
- Ortho Solutions Ltd. - Maldon
- Ortho-Care (U K ) Ltd. - Bradford
- Ortho-Clinical Diagnostics - Cardiff
- Orthodocs Ltd - Belfast
- Orthodynamics Ltd. - Christchurch
- Orthoeurope Ltd - Abingdon
- Orthogem Ltd - Nottingham
- Orthomed - Halifax
- Orthopaedic Footwear Co. Ltd. - London
- Orthopaedic Implants Ltd - Dunmow
- Orthopaedic Innovation Ltd - Sheffield
- Orthopaedic Product News - Harrogate
- Orthopaedic Systems - Widnes
- Orthoponents Ltd - Bacup
- Orthos (Engineering) Ltd - Market Harborough
- Orthos Ltd. - Bristol
- Orthos Projects Ltd. - Market Harborough
- Orthoserve Ltd - Sutton Coldfield
- Orthosonics Ltd. - Newton Abbot
- Orthotics - Stourbridge
- Orthotics Online Ltd - London
- Orthotrac Uk Ltd - Ilkley
- Ortigia Ltd - London
- Ortivus U K Ltd - Fareham
- Ortlinghaus U K Ltd. - Bromsgrove
- Ortomotion Ltd. - Corby
- Orton Farmers Ltd. - Penrith
- Orton Park - Carlisle
- Orton Wholesale Bakeries - Leeds
- Ortons Bakery Ltd - Leeds
- Ortus interim - London
- Oruc - Overseas Property - Sunderland
- Orvec International Ltd. - Hull
- Orvis Co Inc - Exeter
- Orvis Co. Inc - Corbridge
- Orvis Construction Ltd - Ely
- Orwak - Smethwick
- Orwelco (Barrow) Ltd - Barrow in Furness
- Orwell Designs - Harwich
- Orwell Designs Ltd. - Yarmouth
- Orwell Engineering Co (Liverpool) Ltd - Liverpool
- Orwell Pine Co Ltd - Ipswich
- Orwell Pine Co. Ltd. - Ipswich
- Orwell Precision Services Ltd - Woodbridge
- Orwell Property Co. Ltd. - Ipswich
- Orwells Furniture - Ipswich
- Orwin Ltd - Washington
- Orwin Products Ltd - Sutton
- Oryx (Executive Search) Ltd. - Bristol
- Oryx Communications Ltd - Edinburgh
- Oryx Excel Ltd - Aberdeen
- Oryx Services Ltd - Manchester
- Oryx Transport Services Ltd - Hull
- Oryx XL - Aberdeen
- Os Constructions Ltd. - Southampton
- Os Engineering Ltd. - Liverpool
- Os Ltd - Liss
- OS Recruitment - London
- Osa Door Parts Ltd - Runcorn
- OSA Forklift Trucks Ltd - Tipton
- Osai UK Ltd - Bletchley
- Osai-U K Ltd. - Milton Keynes
- Osaka Gas Co. Ltd - London
- Osan Ltd. - Crewe
- Osb Brickwork Ltd. - Staines
- Osberton Grange Farms (Retford) - Retford
- Osborn Associates Ltd. - Edenbridge
- Osborn Bennett Practice Ltd - Stockport
- Osborn Brickwork - Wymondham
- Osborn Customs Services Ltd. - Chatham
- Osborn J & W - Workington
- Osborn Ltd - Douglas
- Osborn Metals Ltd. - Bradford
- Osborn Parkin Ltd - Bishop Auckland
- Osborn Steel Extrusions Ltd - Bradford
- Osborn Steel Stockholders Ltd - Sheffield
- Osborn Strata Products - Rotherham
- Osborn-Unipol (Uk) Ltd. - Chepstow
- Osborne & Clancy Building Contractors - Bristol
- Osborne & Co. (Warrington) Ltd. - Warrington
- Osborne & Dormer Ltd - Woking
- Osborne & Earl - Carlisle
- Osborne & Little Ltd. - London
- Osborne and Collins - Walton on Thames
- Osborne Appointments - Welwyn Garden City
- Osborne Building & Roofing - Llanelli
- Osborne Business Enterprises Ltd. - Chichester
- Osborne Delta (Lightning Conductors) Ltd - Oldham
- Osborne Design Ltd - Windsor
- Osborne Engineering Ltd. - Cramlington
- Osborne Fabrications - Wigton
- Osborne Furniture Ltd. - Hook
- Osborne Graphics - Telford
- Osborne Irish Associates Ltd. - Bristol
- Osborne King & Megran Ltd. - Belfast
- Osborne Machinery - Newtownards
- Osborne Motor Bodies - Saffron Walden
- Osborne Motor Transport Ltd - South Shields
- Osborne Norman A - Lincoln
- Osborne of Ilkeston - Ilkeston
- Osborne P F & J - Westbury
- Osborne Petroleum Services Ltd - Callington
- Osborne Precision Sheet Metal Ltd - Hungerford
- Osborne Refrigerators Ltd. - Bognor Regis
- Osborne Richardson Contracts - London
- Osborne Stationers Ltd - Wolverhampton
- Osborne Technologies Ltd. - Barnsley
- Osborne Transport - Barnsley
- Osborne-Delta - Oldham
- Osbornes Removals & Storage Ltd - Sale
- Osbornes the Tailors Mensw - Lymington
- Osbourn Technical Services - Aberdare
- Osbourne Irish Associates - Bristol
- Osbourne John Chapman - St Neots
- Osbourne Storage Systems - Birmingham
- Osbourne Storage Systems - Solihull
- Osbrown Engineering Services Ltd - South Shields
- OSC Allitec Ltd - Wallingford
- Osca Systems Ltd. - Colwyn Bay
- Oscar + Dehn Ltd. - London
- Oscar Acoustics Ltd - Sevenoaks
- Oscar Associates (Uk) Ltd - Manchester
- Oscar Cars - Hayes
- Oscar Computers Llp - Seaford
- Oscar Constructions Ltd - Hexham
- Oscar Engineering Ltd. - Sevenoaks
- Oscar Faber - London
- Oscar Faber Plc - St Albans
- Oscar Faber Services Ltd. - St Albans
- Oscar Joinery Ltd - London
- Oscar Kilo Ltd - Bideford
- Oscar Mayer Ltd. - Chard
- Oscar Pet & Farm Foods - Stalybridge
- Oscar Pet Foods - Bath
- Oscar Pet Foods Ltd. - Preston
- Oscar Plant Hire & Sales (Maidstone) Ltd. - Ashford
- Oscar Press Ltd - Milton Keynes
- Oscar Products - Sudbury
- Oscar Products Ltd. - Sudbury
- Oscar Telecom - London
- Oscar's Bakery - Faversham
- Oscarpark (Developments) Ltd. - Wishaw
- Oscars - Barrow in Furness
- Oscars - Port Talbot
- Oscars Highclass Taylors - Nottingham
- Oscil Technology Consultants Ltd. - London
- Osco Ltd - Bletchley
- Oscoda Ltd - Rugeley
- Oscott Air Ltd. - Birmingham
- Oscott Blinds - Birmingham
- Osctek Ltd. - Wembley
- Oscura Ltd. - Reading
- Osdin Textiles Trading Ltd. - Glasgow
- OSEC 2000 Ltd - Ipswich
- OSEC-IT Services Ltd - Caerphilly
- Osei Design Associates Ltd - London
- Osel Architecture Ltd. - London
- Osevon - Glasgow
- Osg U K Ltd - Basildon
- OSG UK Ltd - Basildon
- Osgood Brothers Ltd. - Horsham
- Osgood Coleman Property Services - Bookham
- Oshino Lamps (U K) Ltd. - Nottingham
- Oshkosh Specialty Vehicles (Uk) Ltd - Farnham
- Osi Business Supplies Ltd. - Chesterfield
- Osier Graphics Ltd. - Croydon
- Osirian Consulting Ltd. - Reading
- Osiris - Wirral
- Osiris Design - Altrincham
- Osiris Ltd - Nottingham
- Osiris Marine Services Ltd - Keighley
- Osiris Security - Hereford
- Oskomera Facades (U K) Ltd. - Cannock
- Osl Automotive Ltd. - Sheffield
- Osl Collections Ltd - Wallingford
- Osl Shelf Co. No 1 Ltd - Bolton
- Osman Office Equipment Co - London
- Osmar Collection & Delivery Services - Guildford
- Osmer Building Ltd. - Andover
- Osmetech Plc - London
- Osmin Olives - Craven Arms
- Osmond Coote Martin Ltd - Hertford
- Osmond Group Ltd. - Wimborne
- Osmond Hartley (Gateshead) - Gateshead
- Osmond Transport - Tonbridge
- Osmond Tricks Ltd. - Bristol
- Osmond W J - Dorchester
- Osmonds Int Ltd. - Whitchurch
- Osmor Products Ltd - Hassocks
- Osmos Ltd - Naas
- Osmosis Integration Ltd - Uxbridge
- Osmotech - Southampton
- Osnet Data Networks Ltd. - Oswestry
- Osnet Ltd. - Wokingham
- Oso (Buckingham) Ltd. - Buckingham
- Oso Hotwater (U K ) Ltd. - Gateshead
- Ospray U K - Brampton
- Osprey - Coldstream
- Osprey Business Systems Ltd. - Southampton
- Osprey Clarke Ltd - London
- Osprey Corporation Ltd. - Whitstable
- Osprey Design & Engineering Ltd - Chelmsford
- Osprey Developments Ltd. - Bristol
- Osprey Finish Ltd. - Erith
- Osprey Foods International Ltd. - Holt
- Osprey Furnishings Ltd. - Southampton
- Osprey Irrigation - Shrewsbury
- Osprey Ltd - Church Stretton
- Osprey Ltd - Leighton Buzzard
- Osprey Ltd - Scarborough
- Osprey Mini Coaches - Paisley
- Osprey Network & Communications Ltd. - Aylesbury
- Osprey Products - Prenton
- Osprey Products Ltd. - Norwich
- Osprey Recruitment Ltd - Monmouth
- Osprey T S Ltd - Wellingborough
- Osprey Windows Ltd. - Chester
- Ospreydeepclean International Ltd. - Cheltenham
- Osr Sales Recruitment Ltd - Hailsham
- Osram - Slough
- Osram Ltd - Belfast
- Osram Ltd. - St Helens
- Oss Business Interiors Ltd. - London
- OSS Group - Mersey
- OSS Ltd - Worthing
- Oss Storage Centre - Oldham
- Oss-I-Chaff Ltd. - Newark
- Ossam Photo & Battery Centre - London
- Ossett Box Ltd. - Leeds
- Ossett Brewing Co. Ltd. - Ossett
- Ossett Felts (T/u ABF Ltd) - Ossett
- Ossett Industrial Projects Ltd. - Ossett
- Ossett Mouldings Ltd. - Dewsbury
- Ossett Paletts & Fencing - Ossett
- Ossett Photographic Centre - Ossett
- Ossett Steel Services Ltd. - Pontefract
- Ossian Homes Ltd - Paisley
- Ossie's Catering Equipment - London
- Ossur Uk Ltd - Manchester
- Ostar Marine - Emsworth
- Ostell Associates - London
- Ostendorf U K Ltd. - Staines
- Osteo-T I Ltd. - Guernsey
- Osteon Histology Ltd - Sheffield
- Osteotec Ltd. - Christchurch
- Osterley Computer Solutions Ltd - Isleworth
- Osterley Heating & Plumbing Supplies Ltd. - Hounslow
- Osterley Tile Depot - Hounslow
- Ostick & Williams Ltd. - Belfast
- Ostlercrest Ltd. - London
- Ostlers Farm Products - Braintree
- Ostlers Nurseries Ltd - Alderley Edge
- Ostley P J Ltd. - Hampton
- Ostomart - Peterborough
- Ostomart Ltd - Nottingham
- Ostomed Ltd. - Preston
- Ostrich Arts Ltd. - London
- Ostrich Feather Manufacturing Co. Ltd. - London
- Oswald Bailey - Bournemouth
- Oswald Sebley - Norwich
- Oswald Bailey (Southern) - Christchurch
- Oswald Bailey Group Ltd (Salisbury) - Salisbury
- Oswald Bower Removals - Wilmslow
- Oswald Donner and Co Ltd - Leicester
- Oswald H M Loxton - Taunton
- Oswald James Ltd - Mirfield
- Oswald Record - Manchester
- Oswald Record Plant Sales (Midlands) Ltd. - Chesterfield
- Oswald Record Plant Sales Ltd. - Enfield
- Oswald Spring Co. Ltd - Redditch
- Oswald Springs and Pressings - Redditch
- Oswald Supertex Ltd - Huddersfield
- Oswaldtwistle Glass Ltd - Accrington
- Oswaldtwistle Mills - Ripon
- Oswestry & District Agricultural Society - Oswestry
- Oswestry Cabin Services - Wrexham
- Oswestry Electrical & Plumbing Factors Ltd - Oswestry
- Oswestry Industrial Buildings Ltd - Oswestry
- Oswestry Jobcentre - Oswestry
- Oswin & Johnson - Leicester
- OSX Ltd - Faringdon
- Osymar Construction Ltd - Ilford
- Otb Energy Ltd - Lutterworth
- OTC Ltd - Edinburgh
- Otc Precision Ltd. - Wolverhampton
- Otc Publications Ltd. - Solihull
- Otc Welding Products Uk - Warwick
- Oteac Ltd. - Aberdeen
- Otesha Ltd - Bolton
- Otford Builders Merchants Ltd. - Sevenoaks
- Otford Tool & Gauge Co. Ltd. - Sevenoaks
- Othello Blinds Ltd. - Colchester
- Othello Technology Systems Ltd. - Romford
- Othello Travel - London
- Other Creative Ltd - London
- Other Recruiment - London
- Othergroup Ltd - Bristol
- Othniel Shell Fish Farms - London
- Oticon Ltd. - Hamilton
- OTIF Consultants - Huntingdon
- Otis Investments Ltd - Aberdeen
- Otis Investments Ltd - Edinburgh
- Otis Lifts Holding Co - Aberdeen
- Otis Lifts Ltd - Leicester
- Otis Ltd - Burgess Hill
- Otis Ltd - Glasgow
- Otis Ltd - London
- Otis Ltd - Musselburgh
- Otium Computers Ltd. - Middlesbrough
- Otley Brewing Co. - Pontypridd
- Otley Cattle Market Auction Ltd - Otley
- Otley Mills Carpet Warehouse (Ilkley) - Ilkley
- Otley Motors Ltd - Otley
- Otleys Pine - Louth
- Otm Architectural Ltd - High Wycombe
- Otmertold Ltd. - Abergele
- Oto Aluminium Ltd - Featherstone
- Oto Models - Windlesham
- Otodynamics Ltd. - Hatfield
- Otos Services Ltd - London
- OTR Couriers Ltd - Southampton
- OTR Ltd - Newark
- Otrum - London
- OTS Contract Services - Harrow
- OTS Ltd (OTSTORES), - Malvern
- Otsuka Pharmaceutical Co. Ltd. - London
- Otsuka Pharmaceuticals (U K ) Ltd - Uxbridge
- OTT Hydrometry Ltd - Nottingham
- Ott Keyboards Ltd - Bathgate
- OTT2000 Com Ltd. - Witney
- Ottaway Engineering Ltd. - Eastleigh
- Ottawood Sheet Metal Fabrications Ltd. - Hove
- Otter Brewery - Honiton
- Otter Brewery Ltd. - Honiton
- Otter Cabinet Makers - Budleigh Salterton
- Otter Controls Ltd. - Buxton
- Otter House Ltd. - Exeter
- Otter Vale Products - Budleigh Salterton
- Otter Wrought Iron Products - Halstead
- Otterburn Hall Hotel - Skipton
- Otterburn Mills Ltd - Newcastle upon Tyne
- Otterburn Timothy A - York
- Ottershaw (Chertsey) - Chertsey
- Otterson Smith Gordon Ltd. - Epsom
- Otterspool Studio - Guildford
- Ottertech Ltd - Falkirk
- Ottery Electronics - Billingshurst
- Ottery Wholefoods - Ottery St Mary
- Ottilia Saxl - Stirling
- Ottima (SJ and F) Ltd - Portslade
- Ottimo Supplies Ltd. - Batley
- Ottley Controls Ltd - Kettering
- Ottley Harris Machinery Ltd - Gloucester
- Ottley Roller Shutters - Nottingham
- Otto (U K ) Ltd. - Coalville
- Otto Bilz UK Ltd - Coventry
- Otto Bock Healthcare Plc - Egham
- Otto Junker (U K ) Ltd. - Sutton Coldfield
- Otto Kampf Ltd - Wimborne
- Otto Ltd. - Mansfield
- Otto Simon Ltd - Cheadle (Cheshire)
- Otto Work Force Ltd. - Rugby
- Ottobock Healthcare Ltd - Leeds
- OttoDesigns - London
- Ottofield Ltd. - Workington
- Ottoman Textiles Ltd - Manchester
- Ottomotores Uk Plc - Scarborough
- Otton Brothers Ltd - Salisbury
- Ottraco Ltd - Norwich
- Ottways Construction Ltd - Ashtead
- Otus Ltd. - London
- Otv Birwelco Ltd - Birmingham
- Otway Norwood Chartered Surveyors - London
- Oughtred & Harrison (Facilities) Ltd. - Goole
- Oulds Construction Ltd - Derby
- Oulton Ales Ltd. - Lowestoft
- Oulton Forge - Lowestoft
- Oulton Gravel - Lowestoft
- Oulton Joinery - Lowestoft
- Oulton Manufacturing Ltd. - Lowestoft
- Oulton-Lee Research Ltd. - Loughborough
- Oultram T R J M & Son - Frodsham
- Oundle Optical - Peterborough
- Oundle Spares & Repairs Ltd - Peterborough
- Our Architect Llp - London
- Our Design Ltd - Hornchurch
- Our Dogs - Manchester
- Our I T Department Ltd - London
- Our World Recycled Ltd - Leigh on Sea
- Oura Inpex - London
- Ourelia Design Studio - Cardiff
- Oursoles - Southampton
- Ourworld Internet Services Ltd - Swansea
- Ouse & Cherwell Trading Co. Ltd - Brackley
- Ouse Bridge Farms Ltd - Downham Market
- Out & About Ltd - Shepperton
- Out 'N' About A T P Ltd - Bedford
- Out in Wrought - Barnoldswick
- Out N Out - Studley
- Out of Hand Ltd. - Bristol
- Out of Hand Woodcarvings & Sculpture - West Kilbride
- Out of the Box Recruitment Ltd. - Prescot
- Out of the Hat Ltd. - Nottingham
- Out of the Woods - Aylesbury
- Out of the Woods (Staveley) Ltd - Kendal
- Out Performance Display - Colchester
- Out Promotions - London
- Out the Office - Abbots Langley
- Out-Sourcing Initiatives Ltd - Horsham
- Outback (Uk) Ltd - Maidstone
- Outback Automotive Ltd - London
- Outback Contractors Ltd. - Abingdon
- Outboard & Hydroplane Services Ltd. - Ormskirk
- Outboard Care Centre - Poole
- Outboard Motor Loc Ltd - Falmouth
- Outboard Services - Newtownards
- Outbound Field Marketing Services Ltd. - Reading
- Outch Technology Co.,LTD - Abergele
- Outcome Data Ltd. - Elland
- Outdoor & Sports Co. (Holdings) Ltd. - Hyde
- Outdoor Clothing Ltd - Dewsbury
- Outdoor Leisure (UK) Ltd - Studley
- Outdoor Life Group (Uk) Ltd - Beccles
- Outdoor Living Ideas - Warrington
- Outdoor Maintenance - Leeds
- Outdoor Services - Magherafelt
- Outdoor Timber Products - Bridgwater
- Outdoor Toys & Mouldings Ltd - Halesowen
- Outdoor World (warrington) Ltd - Warrington
- Outdoor World Ltd. - Whitley Bay
- Outdoors Gym Ltd - Hastings
- Outdoorwise - Littlehampton
- OuterArc Ltd - Nottingham
- Outerlight Ltd - Edinburgh
- Outhill Boatbuilders Ltd - Studley
- Outkey Trading Ltd - Windsor
- Outland Safety and Industrial Products Ltd - Great Yarmouth
- Outlane Engineering Company - Huddersfield
- Outline Design - Bracknell
- Outline Displays Ltd - Tunbridge Wells
- Outline Engineering Ltd. - Walsall
- Outline Print Service Ltd. - Colne
- Outline Skincare Ltd - Solihull
- Outline Web Solutions Ltd. - Farnborough
- Outliners - Leighton Buzzard
- Outlook - Glasgow
- Outlook (Home Enhancement Centre) - Alnwick
- Outlook It Ltd - Hamilton
- Outlook Press (N I ) Ltd. - Newry
- Outlook Recruitment Ltd - Slough
- Outlook Research Ltd - London
- Outlook Stockholders Ltd. - Coulsdon
- Outlook Unlimited - Solihull
- Outlook Window Systems - Southampton
- Outlook Windows (Glos) Ltd - Cheltenham
- Outlook Windows Ltd. - Watford
- Outlooksoft Ltd. - London
- OutMarket - Stockport
- Outmarsh Books Ltd - Melksham
- Outmere Direct Mail - London
- Outokumpu Copper Nippert - Welwyn Garden City
- Outokumpu Stainless Distribution - Sheffield
- Outperform UK Ltd - Wrexham
- OutProsys (Pty) Ltd - Barton upon Humber
- Outram & Outram Ltd - Bagshot
- Outram Builders Ltd. - Rotherham
- Outram Research Ltd - Chichester
- Outram Research Ltd. - London
- Outrams (Ironmongers) Ltd. - Doncaster
- Outreach Ltd. - Falkirk
- Outreach Plus Services Ltd - Birmingham
- Outreach Sign Services Ltd. - Leicester
- Outright Carpet Cleaning - Peebles
- Outright Engineering Holdings Ltd. - Banbury
- Outsail Telemarketing Ltd - Wootton Bassett
- Outshine Blinds - Hemel Hempstead
- Outside in (Cambridge) Ltd. - Cambridge
- Outside Interests - Bognor Regis
- Outside the Box Architecture Ltd. - London
- Outside Uk Ltd. - Leeds
- OUTSIDE5.Com - London
- Outsidebox.co.uk - Kings Lynn
- Outsights Ltd. - London
- Outsmart the Thief Ltd - York
- Outsource - Knottingley
- Outsource Electronics Ltd. - Havant
- Outsource Management Services Ltd. - Wigan
- Outsource Solutions (N I) Ltd - Antrim
- Outsource Support Ltd - London
- Outsource U K Ltd. - Swindon
- Outsource Wales Ltd - Ammanford
- Outsourced It Ltd - Biggleswade
- Outsourced Marketing Ltd - Chichester
- Outsourcery - Bury
- Outsourcing and Manufacturing Solutions Ltd - Tamworth
- Outspoken Delivery Llp - Cambridge
- Outstanding Branding Ltd - London
- Outstanding Builders Ltd - Oxted
- Outstanding Outcomes Ltd. - Farnborough
- Outstanding UK Ltd - St Austell
- Outwood