Directory Search
Companies supplying Access Control - Systems in All Industry
Access control systems are used to limit access to virtually anything. A car key is a form of access control system as is a chip in an ATM card. However, many more sophisticated systems exist for more commercial uses to control access to doors, turnstiles, parking gates and lifts. In companies with large numbers of computers, role-based access is used, based on levels of authority. More complex systems such as biometric face-recognition are now available.
Index of companies supplying: Access Control - Systems
- Ablaze Building Solutions Ltd - Camberley
Access Automation Ltd - Frome- Access to Time Ltd - Radstock
Accesscaff International Ltd - Beckenham
Ammerhurst Replacement Keys - London- Atlas Group - Slough
- Avonwood Developments Ltd - Wimborne
- Axis Automatic Entrance Systems Ltd - Northampton
- Barcoding Solutions Ltd - Brighton
- Breezemount Electrical and Hydraulics Ltd - Belfast
Buck and Hickman - Coventry
Cambridge Microprocessor Systems Ltd - Dunmow
Camguard Fire and Security - Ely- CEA Systems Ltd - London
- Commend UK - Stansted
- Complete Car Park Solutions Ltd - Rugeley
County Alarms - Slough- Crime Prevention Services Ltd - Mold
Eagle Security Solutions Ltd - London- Easyline Communications Ltd - Horsham
- Egress Systems Ltd - Nottingham
- ESS - Security Ltd - Leeds
- Evolution Electronic Security Systems - Birmingham
- Evolution Electronic Security Systems - High Wycombe
Frontier Pitts Ltd - Crawley- Gane Data Ltd - Leeds
Gate and Barrier Services - Nottingham- GD Security Systems Ltd - Twickenham
Glassman Europe Ltd - Tadley
Grange Security Systems - High Wycombe- Hawkeye Security and Surveillance Systems Ltd - London
Heald Ltd - Hornsea
Hi-Tech Security Systems - Lincoln
Hima-Sella Ltd - Stockport
Holman Security - Barwell- Industrial Remotes - Cookstown
- Isgus UK Ltd - Swindon
KESS - Bristol- Motivation Traffic Control Ltd - Telford
Multicraft Fire and Security - Luton- Nortech Control Systems Ltd - Cwmbran
- PcVue Solutions Ltd - Hitchin
- Prime Security Systems Ltd - Norwich
- Raytel Security Systems Ltd - Rayleigh
Ridley Electronics Ltd - Salisbury- Sapphire Research and Electronics Ltd - Ferndale
- Secure Us Solutions Ltd - Rickmansworth
Securicall - Tottenham
Securitech - Beeston- Technical Alarm Systems Ltd - Southampton
- Telguard - Dorking
The Electric Gate Shop - Sheffield- The Security Network Ltd - Ely
- Videx Security Ltd - Newcastle upon Tyne
- 006900 - Glastonbury
- 1st Aylesbury Plumbing and Heating - Aylesbury
- 21ST Century Associates Ltd. - Belfast
- 2B Electrical Systems - Sunderland
- 3 Dimensions Ltd. - Cambridge
- 4Security - Birmingham
- A & S Services (Nottingham) Ltd. - Nottingham
- A A Plumbing - Maidstone
- A A T B F & Co - London
- A and D Wilson - Sunderland
- A C E Environmental Ltd - Solihull
- A C S Wade Ltd. - Rhyl
- A F R Air Conditioning - Swindon
- A F S (1993) Ltd - Leicester
- A G D Heating - Sittingbourne
- A H S (Mechanical) Ltd. - Leicester
- A J Electrical Engineering Ltd. - Craigavon
- A P D Heating Ltd. - Southampton
- A P V Boiler Services - Kidlington
- A R Adams & Son Ltd. - Newport
- A S Security Alarms - Chard
- A S T E Rail Ltd - Hitchin
- A V Communication Solutions Ltd. - Southport
- A W Intruder Alarms - Abergavenny
- A-T Alarms - Oldham
- A.C.E. Environmental Ltd - Solihull
- A1 Alarms - Duns
- Abacus Security Systems - Chesterfield
- ABB Ltd - Coventry
- ABB Ltd - Workington
- ABB Ltd - Telford
- Ablaze Building Solutions Ltd - Camberley
- Abs Security - Rotherham
- Absolute Access Ltd. - Leeds
- ACA Interiors Ltd - Bicester
- Access Automation Ltd - Frome
- Access Control Services Ltd. - Greenhithe
- Access Direct - Swindon
- Access to Time Ltd - Radstock
- Accesscaff International Ltd - Beckenham
- Ace Electrics - Bury
- Acoustic Ceilings Ltd. - Cardiff
- Acoustic Design Services Ltd. - Havant
- Acs Thermal Engineers Ltd. - Manchester
- Action Security - Preston
- Active Eye Security Systems Ltd. - Fareham
- Active Fire and Security - Frome
- Active Security Systems - Milton Keynes
- ActiveAir Systems Ltd - Newcastle upon Tyne
- Adair & Milliken Ltd. - Belfast
- Addis Construction Ltd. - Keighley
- Adept Alarms - Salford
- Adlink Uk Ltd. - Wembley
- Adpro Securities - Beverley
- Adt Fire & Security Plc - Bristol
- ADT Fire and Security plc - Hemel Hempstead
- ADT Fire and Security plc - Wokingham
- ADT Fire and Security plc - Portsmouth
- ADT Fire and Security plc - Livingston
- Adustus Services (Uk) Ltd. - Hoddesdon
- Advance Security Detection - Dewsbury
- Advance Specialist Systems Ltd. - Worcester
- Advance Systems - Birmingham
- Advanced Mechanical Services - Maldon
- Adville Ltd. - Kettering
- Agile Services - London
- Agm Ceilings - Swanley
- Air Conditioning and Refrigeration Services - Northampton
- Air Serve - London
- Air-Mode Ltd. - Oldham
- AIR2HIRE Ltd - Ipswich
- Airconstruct (Midlands) Ltd. - Cannock
- Airduct Ltd. - Hull
- Airite Designs (North East) Ltd - Newcastle upon Tyne
- Airomet Ltd. - Bromsgrove
- Airow Safe - Gateshead
- Aisfiretech - Coulsdon
- AJB Project Services Ltd - Hayes
- Alarm Co, The - Bracknell
- Alarm Installations - Leeds
- Albert H Elliott - Rugby
- Aldridge Mechanical Services Ltd. - Yeovil
- Alexander Gatey & Co. Ltd. - Glasgow
- Allan Moncrieff Alarms - Leven
- Allcoopers - Gloucester
- Allcoopers Ltd. - Gloucester
- Allied Argus Security Services Ltd. - Gloucester
- Ammerhurst Replacement Keys - London
- Amwell Electrical Ltd. - Hoddesdon
- Anchor Sound and Security - Kings Langley
- Andrews Sykes Hire Ltd - Manchester
- Andrews Sykes Hire Ltd - Wythenshawe
- Anglian Burglar Alarms Ltd - Ipswich
- Antagrade Electrical Ltd - Middlewich
- APB Electrical Services - Sheffield
- Applied Facilities Management Ltd. - Fordingbridge
- Applied Power Services (South Western) Ltd - Rhondda
- Arnold Morris - Manchester
- Arrow Building Services Ltd. - Nottingham
- Arrow Group - Horley
- Arrowpoint Services Ltd. - Glasgow
- Arthur Barlow - Edinburgh
- Asgard Access Control - Harpenden
- Ashford Environmental Services Ltd. - Staines
- Ashley Engineering (Electrical) Ltd. - Worksop
- Asquith & Co. (Refrigeration) Ltd. - Abbots Langley
- Asterisk Maintenance - Birmingham
- Astrofade Ltd - Gateshead
- Atalan Mechanical Services Ltd - Newbury
- Atlas Group - Slough
- Atlas Lifts & Services Ltd. - Aberdeen
- Atlas Security - Sheffield
- Atrium Air Conditioning Ltd. - Guildford
- Auto Gates Ltd - Woking
- Automated Systems Ltd. - Knutsford
- Avonwood Developments Ltd - Wimborne
- Axis Automatic Entrance Systems Ltd - Northampton
- Axxess 28 Ltd. - Camberley
- Azzurri Scotland Ltd. - Glasgow
- B Batch Electrical Ltd. - Hull
- B & F Mechanical Services Ltd - Ipswich
- B A Halston Heating - Dunstable
- B Dodds - Wisbech
- B I Matthews Heating & Plumbing Service - Cardiff
- B J Mechanical Services Ltd. - Sevenoaks
- B M Electronics - Eastbourne
- B P Air Ventilation - Redhill
- B S B Electronics Ltd. - Blackburn
- B T U (Poolservices) - Woking
- Bailey Ltd - Dundee
- Bailey Ltd - Sheffield
- Bailey Teswaine Ltd. - London
- Baker Dougan Ltd. - Portsmouth
- Baker's (Newbury) Ltd - Newbury
- Balcomm Ltd. - Slough
- Balfour Beatty Power Networks Ltd. - Derby
- Bansals Plumbing & Heating - Derby
- Barber Refrigeration - Port Talbot
- Barcoding Solutions Ltd - Brighton
- Barendaire Ltd. - Bristol
- Baring Insulation Ltd. - St Albans
- Barnsley Catering Services Ltd. - Barnsley
- Barrier Surveillance Systems Ltd - Shildon
- Barry Cursons Plumbing & Heating - Herne Bay
- Basingstoke Control Systems - Basingstoke
- Basse Ltd. - Norwich
- Bath Security Alarms - Bath
- Bathroom Installation Services - Bridgend
- BB Maintenance - Kirkby
- Beattie Associated Services Ltd. - Coatbridge
- Beaumont Electrical Ltd. - Hull
- Beaven & Sons Ltd. - Gloucester
- Beavor Service Ltd - Coulsdon
- Beech Hill Electronics - Reading
- Beehive Plumbing Services - Worcester
- Beeney & Co. Ltd. - Uckfield
- Belfry Group Ltd - Warrington
- Belstar Electrics - Northampton
- Bemac Open Systems Ltd. - Bristol
- Bemas Boiler Erectors Ltd. - Nottingham
- Bentley Electrical Installations (Dingwall) Ltd - Dingwall
- BG and J Wakefield Electrical - Crewe
- Bhp Mechanical Ltd. - Feltham
- Bill J Frankon - Warwick
- Blick Telefusion Communications - Derby
- Boiler Care - Hinckley
- Boiler Tech Services - Maidstone
- Boilers - Enfield
- Bond Retail Services Ltd - Swindon
- Bonnett Alarms - Rotherham
- Boostfine Ltd. - Romford
- Border Rail & Plant Ltd. - Coatbridge
- Borley Richard Heating and Mechanical Engineering - Rochester
- Bosch Security Systems Ltd. - Uxbridge
- Bowen Hopkins Ltd. - Swansea
- Bowshers Electrical Services Ltd. - Yeovil
- Breezemount Electrical and Hydraulics Ltd - Belfast
- Brian Hodgson Ltd. - Preston
- Bridgeplex Ltd. - London
- Brilliant Stages - Hitchin
- Britby Plumbing Ltd. - Maidstone
- Brook Security Ltd. - Maidstone
- Brown James Alexander - Lowestoft
- Browns Ladders and Ceilings Ltd - Nelson
- Bryn Golds Plumbing & Heating Services Ltd. - Grantham
- Buck and Hickman - Coventry
- Building & Technical Services (C I ) Ltd. - Guernsey
- Burgin Ltd. - Colchester
- Burnt Ash Ceilings - London
- Business Interiors (Gb) Ltd. - Peterborough
- Butcher Plasterworks Ltd. - London
- Buxton & Longley Ltd - Thornton Heath
- C & C Heating & Plumbing Ltd. - Manchester
- C & M Electrical Contractors & Maintenance Ltd. - Middlesbrough
- C A Langston Plumbing & Heating Ltd - Cannock
- C and H Alarm Systems - Barnsley
- C B C Security Ltd. - Milton Keynes
- C B S Maintenance Services Ltd. - Dartford
- C C N Ltd. - Leeds
- C C Refrigeration - Nottingham
- C E Bennett and Sons - Liversedge
- C E I Electrical Ltd. - Southampton
- C I E International Ltd. - St Neots
- C J B Heating & Plumbing - Cranleigh
- C W Carr & Co - Hailsham
- C&D Industrial Services Ltd. - Mansfield
- C.W.Gosling Ltd - Bromley
- Calcutt Maintenance Services Ltd. - Swindon
- Calder Services (Lancashire) Ltd - Clitheroe
- Caldera Fire and Security Ltd - Fareham
- Cam-Tec Surveillance Systems - Stoke on Trent
- Cam-Tec Systems Ltd - Newton Aycliffe
- Cambridge Microprocessor Systems Ltd - Dunmow
- Cambridge Online Systems Ltd. - Cambridge
- Cambs Lock and Safe - Cambridge
- Camera One Ltd. - Birmingham
- Cameras Stop Crime - Dumfries
- Camguard Fire and Security - Ely
- Camplings - Leicester
- Capital Alarms - Belfast
- Capital Fire and Security Alarm Systems - Inverness
- Car Connection - Birkenhead
- Caretech Systems Ltd - Cramlington
- Carillion Technical Services (Installation) Ltd. - Norwich
- Carnforth Security Alarms - Carnforth
- Carter-Voce Access Control Ltd. - Surbiton
- Carval Computing Ltd. - Plymouth
- Cassec Ltd - Brighton
- Castle Point Gas & Heating Co. Ltd. - Benfleet
- Caswell Refrigeration Ltd - Swindon
- Cdt UK - Ringwood
- CEA Systems Ltd - London
- Ceaton Security Services Ltd. - Cardiff
- CEL Ltd - Surbiton
- Central Alarm Systems - Shanklin
- Central Home Alarms - Crieff
- Centrica RPS Ltd - Barrow in Furness
- Cep Ceilings Ltd. - Frome
- Chamic Industrial Services Ltd. - Edinburgh
- Charman Telecommunications Ltd - Farnham
- Charnwood Cabling Systems - Loughborough
- Chase Plant Hire Ltd. - Walsall
- Check Alarms - Hamilton
- Cherry Security Co. Ltd. - Eastbourne
- Chesney William J - Chatham
- Chesters Electrical - Hull
- Chill Factor Services Ltd - Cardiff
- Chris Humble Electrical - Darlington
- Christopher Sears - Windsor
- City Insulation Contractors Ltd. - Oxford
- City Response Ltd. - Manchester
- CK Communications - Bridgend
- Clayman Electronics Ltd. - Wimborne
- Cleveland Refrigeration Co. Ltd. - Middlesbrough
- Cobra Security Systems Ltd - London
- Cobus Communications - Hull
- Cobus Ltd - Hull
- Cokeless Cupolas Ltd - Stourbridge
- Coldtech Refrigeration Services - Middlesbrough
- Colin Bullot & Sons Ltd. - Waltham Cross
- Colin Peacock Ltd. - Wickford
- Colt International Ltd - Leamington Spa
- Colton Electrical - Norwich
- Combined Electrical & Engineering Services Ltd. - Dorchester
- Commend UK - Stansted
- Community and Seasonal Engineering - Carnforth
- Complete Car Park Solutions Ltd - Rugeley
- Complete Heat (Scotland) Ltd. - Cowdenbeath
- Complete Technical Services Ltd. - Rotherham
- Comtec (Cheshire) Ltd. - Warrington
- Connals Oil & Gas Services Ltd. - Leicester
- Constellation I X Ltd. - Leicester
- Contracts A S Ltd - Birmingham
- Controline - Elland
- Controlled Climate Ltd. - Wells
- Controlsoft Ltd - Cheltenham
- Coolair Equipment Ltd - Maidstone
- Coolex Ltd - Tenterden
- Coomber Security Systems Ltd. - Taunton
- Cornerstone Network Services Ltd. - Glasgow
- Cosgriff Whitehouse Electrical Ltd. - Wolverhampton
- County Alarms - Slough
- County Communications - Stroud
- Cov-Tek Security Systems Ltd. - Coleraine
- Crabtree Security - Darlington
- Cragg M H & Sons Ltd. - Bolton
- Cram Electrical Ltd. - Hamilton
- Crime Prevention Services Ltd - Mold
- Crimestop Security Systems - Edinburgh
- Crimewatch Safeguard Security Systems Ltd - Middlesbrough
- Criteria Workspace Solutions Ltd. - Melton Mowbray
- Crown Security - Guisborough
- Crystalair Ltd - Peterborough
- CSE Alarms - Chorley
- CT Walters (Electrical) Ltd - Brackley
- CTS Security Ltd - Kings Lynn
- Cunninghams - Birmingham
- Custom Keyboard Electronics - Southampton
- Custom Micro Products Ltd. - Poole
- D & B Giles Ltd. - Market Rasen
- D A C Air Conditioning Ltd. - Pudsey
- D B Brooks (Electrical Engineers) Ltd. - Heanor
- D C Lighting Ltd. - Didcot
- D Cresswell & Son (Electricians) Ltd. - Nottingham
- D Hobson - Leeds
- D J Brown - St Albans
- D M Stewart Ceilings & Partitioning Ltd. - Brierley Hill
- D M G Technical Services - Cardiff
- D Price and Associates Ltd - Birmingham
- D T J Electrical Ltd. - Preston
- D V Melvin & Sons - London
- D Wooldridge - Walton on Thames
- D&M Barthorpe - Boston
- D.J. Tucker Ltd - Redcar
- DA Security Systems Ltd - Gosport
- Dac Security - Dunfermline
- Daihatsu Entrance Systems Ltd. - Bootle
- Daly Heating Contractors Ltd - Coventry
- Damar Ceilings Ltd. - Macclesfield
- Danebridge Engineering Ltd. - Manchester
- DankoSec Ltd - Crawley
- Darfen Durafencing - Birmingham
- Darpan Controls Ltd - Nottingham
- Dartmouth General Contractors Ltd. - Fareham
- Daton Electrical Services Ltd. - Reading
- Dave Banks Electrical - Chesterfield
- Dave Casey & Co Ltd - Hartlepool
- David Fear Electrical Contractors Ltd. - Bristol
- David Ford Mechanical & Electrical Ltd. - Sheffield
- David N Crabb - Dundee
- David Paradine (Electrical) Ltd. - Walsall
- Davies D P - Shrewsbury
- Davison Electrical - Bournemouth
- Dawson & Son Electrical Contractors Ltd. - London
- Debco Rentals Ltd. - Enfield
- Dee Civil Engineering Ltd. - Mold
- Delta Telecom Sound & Security Ltd. - Stockport
- Denvak Electrical Ltd. - Westerham
- Derek Senior Plumbing & Heating - Hebden Bridge
- Des Electrical Contractors Uk Ltd. - Blackpool
- DES Goup Ltd (Northern) - Holmfirth
- DG Alker - Craven Arms
- Dicks (Electrical Installations) Ltd - Winchester
- Direction Fire Ltd - Epsom
- Dmn Installations Ltd - Swindon
- Dobson & Surrey Ltd. - North Shields
- Dodd Group Ltd. - Norwich
- Dorchester Design - Wareham
- Dowds Electrical (Holdings) Ltd. - Ballymoney
- Doyle Trevor R - Romford
- Dragon Security - Norwich
- Drewlec Ltd. - Bournemouth
- Duchy Alarms - Truro
- Duddon Electronics Ltd. - Coniston
- Dugdales Electricals - Settle
- Dunelm Office Interiors Ltd. - Gateshead
- Dwellight Ltd - Leeds
- E A C Services Ltd. - Godalming
- E E Thompson & Son Ltd. - Preston
- E I W H S - Coventry
- E L Heating Ltd. - Chippenham
- E Rushton (Electrical) Ltd. - Nelson
- E&K Automation Ltd. - Tadley
- E. Sharp (Electrical) Ltd - Aylesbury
- E.G.& L.B.Martin Ltd - Spalding
- Eagle Security Solutions Ltd - London
- Eagle Security Systems - Birchington
- Eastern Security Ltd - Southend on Sea
- Easyline Communications Ltd - Horsham
- Eclipse Alarms Ltd. - Leamington Spa
- Eclipse Digital Solutions Ltd - Melton Mowbray
- Eco Electrical Centre - Sevenoaks
- Edward Clay & Son Ltd. - Ossett
- Edward Dewhurst Ltd. - Preston
- Efaflex UK Ltd - Stourbridge
- EFR Refrigeration Co - Ilford
- Egress Systems Ltd - Nottingham
- EK Mechanical Services Ltd - Westcliff on Sea
- Elec 2000 - Harwich
- Eleco Dowding & Mills Ltd. - Aberdeen
- Electrical & Associated Services Ltd. - Rochester
- Electrical Building Systems Ltd. - Addlestone
- Electro Freeze - Fraserburgh
- Electroguard Security Systems - Dundee
- Electron Systems Ltd - Chester le Street
- Electrosafe Ltd. - Burntwood
- Elespa Ltd. - Sandwich
- Ellison Energy Services Ltd - Shipley
- Elmeridge Cable Services Ltd - Basildon
- EM Mackenzie and Co Ltd - Glasgow
- Em-B Solutions Ltd - Leeds
- Emergency Power Services - Huntingdon
- Emerson Contract Services Ltd. - Hornchurch
- Empire Alarms - Birkenhead
- Emsley Plumbing and Heating - Winchester
- Energy Store Ltd. - Lisburn
- Enteam Consultants Ltd. - Buntingford
- Environmental Advice Centre Ltd - Mold
- Envirotech Services Ltd - Edenbridge
- EPMS Ltd - Hinckley
- Eps Group Ltd. - Orpington
- Equipment Supplies & Services - Dungannon
- Ergro Mechanical Services Ltd. - Redhill
- ESS - Security Ltd - Leeds
- Essex Security Services Ltd - Loughton
- Estil Ltd. - Dudley
- Eurolink Security Installations Ltd. - Cheltenham
- Europa Electrical Ltd - Derby
- Europa Support Services - Godalming
- Evans & Shea Ltd. - Romford
- Evans Security - East Kilbride
- Evolution Electronic Security Systems - Birmingham
- Evolution Electronic Security Systems - High Wycombe
- Excel I T Ltd. - Grays
- Express Refrigeration (Contractors) Ltd. - Immingham
- Extracair Installations Ltd - Poole
- F A Lachmann Consultants Ltd - Leeds
- F B I Electrical Ltd. - Stockport
- F I T S Ltd. - Bristol
- F P Hurley & Sons Ltd. - Bridgend
- F Warren (Electrical) Ltd - Newton Aycliffe
- Fabricair Systems Ltd. - Birmingham
- Fairley Brown & Co. Ltd - Reading
- Falcon Plumbing and Heating Engineers - Enfield
- Falcon Security Systems - Canterbury
- Farebrother Ltd. - Manchester
- Fast Formwork Ltd. - Warrington
- Fastek Electronics Ltd. - Linlithgow
- Fellsafe Electrical - Bournemouth
- Fenweld Engineering Services - Chester
- Fern Industrial Services Ltd. - Oldham
- Ferngas Ltd. - Ferndown
- Fibre Comm Solutions Ltd. - Nottingham
- Finning Acquisition Co. Ltd - Birmingham
- Firecrest Heating Services Ltd - Kings Langley
- First Call Heating Ltd. - Eastleigh
- First in Service Ltd. - Birmingham
- Fisher Refrigeration Ltd. - Cambridge
- Forest Electrical Services Ltd. - Ilminster
- Foster Environmental Ltd. - Scunthorpe
- Frankham Ventilation Ltd. - Brierley Hill
- Fraser Morphew Plumbing - Cheltenham
- Fred Hanson (Pontefract) Ltd. - Pontefract
- Freeway Signs Ltd. - London
- French Brothers Insulation - Leicester
- Fridge Systems Ltd. - Cannock
- Frontier Pitts Ltd - Crawley
- Frost Duval Ltd. - Sidcup
- Ftp Ltd. - Evesham
- Fursdon M R & G R - Newton Abbot
- G Collier & Sons Ltd. - Prescot
- G Hoses - Salford
- G & A Barnie Electrical Contractors - Wick
- G B A (Electrical) Ltd. - Bury St Edmunds
- G Com Networks Ltd - Dundee
- G E M S (Scotland) Ltd - Hamilton
- G E S Security - St Albans
- G K Electrical Ltd. - Slough
- G M C Fire & Security - Malton
- G P Security & Electrical Services - Caernarfon
- G P Watson Ltd. - High Wycombe
- G R Mechanical Services Ltd. - Plymouth
- G W Franklin M & E Services Ltd. - London
- Gair Gas Ltd. - Eastleigh
- Gane Data Ltd - Leeds
- Gas Appliance Services (2000) Ltd. - Paisley
- Gas Care Wales Ltd - Cardiff
- Gas Central Heating Services Ltd. - Rochdale
- Gas Heating Services - Brierley Hill
- Gas Services Direct Ltd. - Glasgow
- Gas Servwell Ltd. - Bristol
- Gascoynes (Derby) Ltd. - Derby
- Gasfix - Sunderland
- Gasman - Northampton
- Gastec Services - New Malden
- Gate and Barrier Services - Nottingham
- Gateshead Cps - Gateshead
- GC Interiors UK Ltd - Gloucester
- GCS Alarms - Clacton on Sea
- GD Security Systems Ltd - Twickenham
- Genplus Systems Ltd. - Scarborough
- George Birchall Ltd. - Edinburgh
- George Varcas & Partners - Reading
- George Walsh & Co. (Electrical) Ltd. - Blackburn
- GFE Services and Lighting Supplies (GFE Services and Lighting Supplies) - Crewe
- Gibson-Wight Ltd. - Kilmarnock
- Gilbert & Creasey - Boston
- Gilks (Nantwich) Ltd. - Nantwich
- Gill Insulation Nottinghamshire Ltd - Nottingham
- Gill Trevor - Leeds
- GKB Electronics Ltd - Newbury
- Glamorgan Electrical Ltd - Port Talbot
- Glassman Europe Ltd - Tadley
- Glen Farrow (U K) Ltd. - Spalding
- Glendale Alarms Ltd - Dunfermline
- Globe Alarms Ltd. - Salford
- Glynnlogan Lifts Ltd. - North Berwick
- GM Electronics - Belfast
- Goff & Crawford Ltd. - Pinner
- Goodrich Actuation Systems Ltd. - Wolverhampton
- Gordon Stones (Industrial Services) Ltd - Wolverhampton
- Grahame Pratt - Dunstable
- Grange Security Systems - High Wycombe
- Grate Manly Mechanical Services Ltd - London
- Gratte Bros Catering Equipment - Stevenage
- Grayman John W - Coventry
- Graystones Development (Selby) Ltd - Selby
- Green Contract Services - Sandbach
- Grenfell & Sons Ltd. - Stourbridge
- Groestar Ltd. - Tonbridge
- Ground Remediation Systems Ltd. - Wigan
- GSM Secure - Stockport
- Gt.Yarmouth Heating Company Ltd - Great Yarmouth
- Guaranteed Heating & Plumbing Co. Ltd. - Rickmansworth
- Gus Robinson Developments Ltd. - Hartlepool
- H & R Boilercare Ltd. - Hoddesdon
- H and C Moore Ltd - Leeds
- H C Daly - Brierley Hill
- H E Barnes (Electrical) Ltd. - Sheffield
- H I Services Ltd. - Maidstone
- H J Heating and Plumbing - Northwood
- H King & Sons - Sherborne
- H M Electrics Ltd. - Maghera
- H.S. Harbon & Sons Ltd - Doncaster
- Halson Refrigeration - Rochdale
- Hampshire Electrical - Basingstoke
- Harnwell Electrical - Wisbech
- Harold Wood & Sons (Plumbing & Heating) Ltd. - Nottingham
- Harrison Electrical Ltd. - Leeds
- Harrison Sprinkler Co. Ltd. - Bolton
- Harton Heating Appliances Ltd - London
- Hawkeye Security and Surveillance Systems Ltd - London
- Hay's Electrical Service's Ltd - Stalybridge
- Head Gerald - Farnham
- Heald Ltd - Hornsea
- Heat Connection - Aberdeen
- Heat Plant Services - Bracknell
- Heatcare - Sutton
- Heath Engineering Ltd. - Widnes
- Heating & Boiler Services Ltd - Widnes
- Heating and Cooling Technology Ltd - Wellingborough
- Heating and Plumbing Maintenance - Colchester
- Heatons Mechanical Ltd - Stockport
- Hemsworth Electrical (A division of BCS Electrics Ltd) - Leeds
- Henderson Electrical Services Ltd. - Ely
- Hensall Mechanical Services Ltd. - Goole
- Herts Heating Ltd - Welwyn Garden City
- Hesketh Steel Fabrications Ltd - Bolton
- Heventech Mechanical Services Ltd. - Ilford
- HFS Engineering Ltd - Newry
- Hi-Lex Cable System Co. Ltd. - Port Talbot
- Hi-Tec Controls - Bolton
- Hi-Tech Security Systems - Lincoln
- Higgins Paul S - Market Drayton
- Hillfoot Homes Ltd - Tillicoultry
- Hima-Sella Ltd - Stockport
- Hinckley Air Conditioning and Refrigeration Ltd - Leicester
- Hinton Electrical Services - Abergele
- HLC Direct Services Ltd - London
- Hobbs Electrical Services Ltd - Milton Keynes
- Hockley Building Services Ltd. - Birmingham
- Holborn Projects Ltd. - Birmingham
- Hollisters (Electrical Contractors) Ltd. - Gravesend
- Holman Security - Barwell
- Home Security Systems - Rotherham
- Hornchurch Electronics - Hornchurch
- Hotchkiss Ltd - London
- Hull Mechanical Services Ltd. - Gerrards Cross
- Hutcheon Services Ltd. - Aberdeen
- Hutton Mechanical & Electrical Services Ltd. - Belfast
- Hyde Windings Ltd. - Hyde
- I D S Electrical Ltd. - Birmingham
- I D S Security Systems Ltd. - Cardiff
- Ian McCann - South Shields
- Ideal Engineering - Belfast
- Ideal Tanks & Pumps Ltd. - Northampton
- Identify Ltd. - Hythe
- iFacility - Shepton Mallet
- Iforge Ltd. - Twickenham
- IMAJ (UK) Steel Doors Ltd - London
- Impact Control Systems Ltd. - Liverpool
- Imtech Meica Ltd. - Ashford
- Independent Communication Solutions Ltd. - Sleaford
- Index Security Systems Ltd. - Ascot
- Indtherm Ltd. - Dudley
- Industrial (Boiler & Contract) Services Ltd. - Fareham
- Industrial Doors & Shutters Ltd. - Bolton
- Industrial Electrical Services - Warrington
- Industrial Heating Services - Newton Aycliffe
- Industrial Remotes - Cookstown
- Industrial World Consultants Ltd - Blackpool
- Innovative Electronic Technology Ltd - Hemel Hempstead
- Instalectric Co. Ltd. - St Albans
- Integrated Ceilings & Partitions Ltd. - Troon
- Interface Contracts Ltd. - Oldham
- Interlink Scaffolding Ltd - Durham
- Interphase Electrical - Halstead
- Intersys Micronics Ltd - Lytham St Annes
- Invincible Security Ltd. - Ardrossan
- Irlam Electronics - Manchester
- Isgus UK Ltd - Swindon
- Island Air Conditioning - Newport
- Island Cooling Engineering - Cowes
- Ivan Kilbee Heating Ltd. - Abingdon
- J G Kelley (Fleetwood) Ltd. - Fleetwood
- J & B Hopkins Ltd. - Fareham
- J & S Plumbing & Central Heating Contractors - Buckhurst Hill
- J A Richardson (Electrical) Ltd. - Leeds
- J and F Controls Ltd - Westerham
- J and J Alarms - Nuneaton
- J Brears Electrical Contractors - Matlock
- J D Air Supply Systems Ltd. - Glasgow
- J Fletcher (Engineers) Ltd - Manchester
- J Frood and Sons - Lanark
- J H Blount & Co. Ltd. - Wolverhampton
- J H Shouksmith & Sons Ltd. - Leeds
- J Higgs Ltd - Nottingham
- J Paterson & Son (Plumbers) Ltd. - Edinburgh
- J R B Cable Installations Ltd. - Heywood
- J R E Dinnage Ltd. - London
- J Shaw Electrical Engineers Ltd. - Manchester
- J V Heating Scotland - Glasgow
- James Campbell & Son - Hillsborough
- James Connor Heating - Sunbury on Thames
- James W Alexander - Musselburgh
- Janus Alarms Ltd. - Worcester
- JB-EYE (Fire and Security) - Manchester
- Jeff Ogden Plumbing & Heating - Stockport
- Jefferson Electrical Ltd. - Driffield
- Jet Security - Greenford
- Jett Communications Ltd - Swanley
- John A Gaunt (Electrical Contractor) Ltd. - Oldbury
- John Alderson & Son Ltd. - Pudsey
- John Callum - Airdrie
- John Clark Services Ltd. - Braintree
- John E Mawer - Harrogate
- John G Humphreys (Electrical) Ltd. - Caldicot
- John Hardiment (Heating) Ltd - Cambridge
- John Heaney (Electrical) Ltd. - Livingston
- John McNicol and Co (Electrical Engineers) Ltd - Glasgow
- John Murphy Electrics - Omagh
- John Severn Conservatories Ltd - Doncaster
- Johnson K J - Peterborough
- Johnston Mechanical Services - Bonnybridge
- Joseph H Wood & Son Ltd. - Manchester
- JR Colston and Co - Oxford
- JRG Technicom - Hinckley
- JS Fire Protection Ltd - St Leonards on Sea
- Jsj Gas Ltd. - Bournemouth
- Jude Engineering - Corby
- K & P Heating & Plumbing - Cambridge
- K Binks (Heating) Ltd. - Hull
- K P Utilities Ltd. - March
- K Roots & S Allen - Rochester
- Kaba (UK )Ltd - Tiverton
- Karrena Furnace Engineering Ltd - Chichester
- Kaw Installations Ltd - Wolverhampton
- Kay Electrical Ltd. - Harrogate
- KBR IT Networking Solutions Ltd - Chester le Street
- Keatmay Ltd. - London
- Kelvent - Glasgow
- Kennedy Services Ltd - Washington
- Kenneth J Chandler Ltd. - Aldershot
- Kenneth Wallace - Armagh
- Kent Electronic Services - Maidstone
- KESS - Bristol
- Kezelec Electrical Contractors - Northampton
- King Communication Services - Coatbridge
- King's Plumbing & Heating - Carluke
- Kinsman Air Systems Ltd - London
- Kitchens & Bathrooms Plus Ltd. - High Wycombe
- Knighthood Security Systems Ltd - London
- Kramer Ltd. - Halesowen
- Kraus & Naimer Ltd. - Newbury
- L M Electric - Belfast
- L P T Refrigeration Co - Hemel Hempstead
- L R Holton - Huddersfield
- L.H. Bishop Electric Company Ltd - Dudley
- Lancashire Security Systems - Rochdale
- Landmark Lifts Ltd. - Northampton
- Lanes for Draines (North West) - Manchester
- Lanes Plumbing & Heating - London
- Langley Fletcher Ltd. - Chester
- Layer Products Ltd. - Colchester
- Leakbusters Ltd. - London
- Lee & Sons (Littleport) Ltd - Ely
- Lee Beesley (Coventry) Ltd - Derby
- Leicester Steam Specialists Ltd. - Leicester
- Leighton Carter Insulation Co. Ltd. - Newport
- Levertech Engineering Services Ltd. - Manchester
- Lewis Ductwork - London
- Lilleker Bros Ltd. - Rotherham
- Lincliff-Task - Nottingham
- Linkwood Services Ltd - Potters Bar
- Lisca Engineering Services Ltd - Belfast
- Locksley Engineering Co. Ltd. - Belfast
- Logistical Building Services Ltd - Southampton
- LOL Electrical Services - Hatfield
- Lorne Stewart Plc - Chelmsford
- Lostock Electrical Projects Co. Ltd. - Bolton
- Lovekin Heating - Aldershot
- Lovell Derek L - Taunton
- Low Therm (U K ) Ltd. - Cleethorpes
- Lutterworth Electrical Services - Lutterworth
- M Gregory Electrical Contractors Ltd. - Derby
- M & E Installations Ltd. - Surbiton
- M & S Security Systems - Merthyr Tydfil
- M and L Associates - London
- M and R Building Engineering Services - Redhill
- M and S Plumbing - Romford
- M B H Industrial Services Ltd. - Taunton
- M E S Systems Ltd. - Nuneaton
- M J Security Systems Ltd. - Dunstable
- M J McGrath - Enniskillen
- M T Buxton Industrial Services Ltd - Nottingham
- M T S - Bexleyheath
- M W Contracts - Leeds
- Mac Marney Refrigeration & Air Conditioning Ltd - Ipswich
- Magtech - Wigston
- Main Bank Electric - Antrim
- Maintel U K Ltd. - Whitchurch
- Malcolm Prescott - Leigh
- Malrod Insulations Ltd. - Bolton
- Mannofield Electrical Ltd. - Aberdeen
- Marine Co. Uk Ltd. - Loanhead
- Mark Evans - Bristol
- Mark Hayes - Congleton
- Marval Mechanical Services Ltd - Colwyn Bay
- Mason E B & Son - Nottingham
- Master Thatchers - EE Sharp and Son - Reading
- Matthews & Tannert Ltd. - Nottingham
- Mayfair Security Ltd. - Southminster
- Mayo Plumbing and Heating Services - Tamworth
- MBS Engineering - Manchester
- McAuliffe Environmental Design Ltd - Kirkcaldy
- McCarthy Christopher - Bournemouth
- McDevitt Electrical Services - Limavady
- McGill Electrical Ltd - Glasgow
- McGill Electrical Ltd - Dunfermline
- McGoff & Vickers Ltd. - London
- McMaster Electrical Services - Bathgate
- McTigues Ltd - Dorking
- Mellor Bromley Air Conditioning Services Ltd - Leicester
- Met Anglia Ltd. - Fakenham
- Metainy Air Conditioning - Sunbury on Thames
- Meteor Heating & Plumbing Co - Birmingham
- Michael Lees - Dolgellau
- Michael Ross and Son - Castle Douglas
- Microlynx Data Cable Installations - Batley
- Micropoint Plus Ltd. - Slough
- Middleton Heating - Swadlincote
- Midlands Electrical Specialists Ltd - Tamworth
- Mike Barnett Ltd. - Egham
- Miles Architectural Ironmongery Ltd - Bristol
- Millers Alarms Ltd. - Nottingham
- Millside Ltd. - Sheffield
- Minack Mechanical Maintenance Ltd - Epsom
- Minchella Chris - Swansea
- Mitrefinch Ltd. - York
- Mobbs Electronic Repairs Ltd. - Bude
- Molbeck Services Ltd. - Cannock
- Moore Environmental (U K ) Ltd. - Caterham
- Motivation Traffic Control Ltd - Telford
- MP Alarms - Kings Lynn
- MTS Consultancy - Scarborough
- Mullins Heating - Shrewsbury
- Multicraft Fire and Security - Luton
- Musketeer Engineering Ltd. - Lisburn
- My Boiler Services Ltd. - Norwich
- N G Plumbing & Heating Ltd. - Selby
- N H Electrics - Woking
- N J Richards Ltd. - Hatfield
- N Newmarch Plumbing & Heating - London
- N T Systems - Huddersfield
- N T Ward - Pinner
- National Design Consultancy - Sutton Coldfield
- Nettlebank Monumental Works Ltd - Cheadle (Cheshire)
- Network Connect Ltd - Ashton under Lyne
- Network Engineering Technology Ltd. - Reading
- Network Security & Alarms Ltd. - Basingstoke
- Nevill Long - Hounslow
- Newark Alarm Systems - Newark
- Newman Insulation - Gateshead
- Nhp Projects Ltd. - Salisbury
- Niche Lifts Ltd. - Bromley
- Niscayah Ltd. - London
- Nobbs & Jones Ltd. - Preston
- Norfolk Boiler Services - Diss
- Norfolk Heating Ltd. - Norwich
- Nortech Control Systems Ltd - Cwmbran
- North Lincs Electrical - Brigg
- North Park Refridgeration - Kettering
- North Wirral Electrical Services - Wallasey
- Northamptonshire Electrical Contracting Ltd. - Kettering
- Northern Insulation Contractors - Stalybridge
- Nu-Tech Alarms - Banstead
- O & M Electrical Services Ltd. - Halifax
- O'Neill Electrics - Omagh
- Oakwood Air Conditioning - Cheadle (Cheshire)
- Oasis Engineering Ltd. - Merthyr Tydfil
- Oco Ltd. - Dartford
- Octopus Electrical Ltd. - Shrewsbury
- Oggle Ltd - Milton Keynes
- OHM Security Ltd - Leeds
- Olphert AW - Strabane
- Olympic Electrical - Forest Row
- Omega Building Services Ltd. - Caterham
- Omega Mechanical Services Ltd. - Londonderry
- Omiran Ltd. - Bury St Edmunds
- On Tap Services - Slough
- Online Plumbing Services - Abbots Langley
- Ontime Systems Ltd. - Aylesbury
- Optimum Controls Services Ltd - Ipswich
- Oriental Security Systems Ltd. - Liverpool
- Origin Leisure Ltd. - Uxbridge
- Otis Ltd - Musselburgh
- Overton Electrical Services Ltd. - Mansfield
- Owen Refrigeration Ltd - Wellingborough
- Owl Security Systems - Romford
- Oxford Refrigeration Ltd. - Oxford
- Oxford Technical Services - Oxford
- P Taylor Ltd. - Preston
- P Taylor Ltd. - Preston
- P & D Installation Services - Prenton
- P & M Coppack Air Conditioning Ltd. - Bacup
- P D Heating Ltd - Poole
- P D Technology Ltd. - Bradford
- P Dougan Electrical - Ballymena
- P I Underwood & Son Ltd. - Cardiff
- P J Electrical Installations - Liverpool
- P J G Electrical Ltd. - Milton Keynes
- P M Burgess - Luton
- P O'Neill Electrical Ltd. - Luton
- P. H. E. Installations Ltd - Hayes
- Pace Eastern Ltd. - Bedford
- Papworth K P & Sons - Cambridge
- Parkersell Lighting & Electrical Services - Taunton
- Parkerwood Ltd. - St Helens
- Parkwood Contracts Ltd. - Gillingham
- Pat McCorley Mechanical Services Ltd. - Antrim
- Paul Bice - Perranporth
- Paul Murten Joinery - Doncaster
- Paul Snape Associates - Preston
- PC Dynes (Insulations) - Dungannon
- PCB Security Systems - Rayleigh
- PcVue Solutions Ltd - Hitchin
- PD Systems - Edinburgh
- PDI (Utilities Design and Management) Ltd. - Norwich
- Pendle Designs Ltd. - Bury
- Penmann Climatic Systems Ltd. - Otley
- Performance Electrical Ltd. - Bury
- Perth Alarm Systems - Perth
- Phoenix Gas and Heating - Dartford
- Photondale Electrical Services Ltd. - Southport
- Pickerings Ltd - Glasgow
- Pieri Interiors Ltd. - Sheerness
- Pitkerro Ltd. - Dundee
- Pitkin and Ruddock Ltd - Bury St Edmunds
- PJ Spencer Ltd - Ashton under Lyne
- Plant Movements Ltd - Hailsham
- Plasterers (Liverpool & Chester) Ltd. - Cardiff
- Platinum Automated Entries Ltd. - Northwich
- PME - Planned Maintenance Engineering Ltd - Bristol
- Pme Services Ltd. - London
- PN Ventilation - Beccles
- Poole D J - Winsford
- Portsdean Technical Supplies & Services Ltd. - Fareham
- Power Control Panels (Cambridge) Ltd. - Cambridge
- Prestige Communications - Swindon
- Prestige Shopfitting Services Ltd - Ferryhill
- Primair Ltd. - Gillingham
- Prime Security Systems Ltd - Norwich
- Priory Mechanical Services Ltd. - Caterham
- Pro Deck Solutions Ltd. - Coventry
- Pro Net U K Ltd. - Doncaster
- Protek Fire & Security Ltd. - Poole
- Protier Ltd. - Pudsey
- Psp Plumbing & Heating Ltd. - Arundel
- Putney Plumbers Ltd. - London
- Q. D. Services Ltd - Bootle
- Quay Healthcare Ltd. - Weymouth
- Queensway Pipework Services - Bristol
- R Cox Electrics Ltd. - High Peak
- R & I Electrical Services Ltd. - London
- R & I Security - Livingston
- R B Long Plumbing & Heating - Eastleigh
- R D Brett (Electrical Contractors) Ltd - Ascot
- R E D Electrics Ltd. - Newtownabbey
- R E P Electrical Alarms - Telford
- R G Buckle Contract Services Ltd. - Pudsey
- R H B Partnership Llp - Winchester
- R H K Davidson & Co. (Coleraine) Ltd. - Coleraine
- R I Shanks Mechanical Services Ltd. - Loughborough
- R L M Electrical Services - Worcester
- R M Fabrications Ltd. - Ferndown
- R S G Engineering Ltd. - Cannock
- R W H & Sons Ltd. - Exeter
- R White Plumbing & Heating - Caldicot
- R.D. Jukes & Co. Ltd - Walsall
- R.F. & P.M. Taylor Ltd - Spilsby
- Ram Installations - Kingston upon Thames
- Rapid Maintenance Ltd. - Wirral
- Ray Cope - Stoke on Trent
- Rayleigh Electrical Factors Ltd. - Rayleigh
- Raytel Security Systems Ltd - Rayleigh
- Re-Style Loft Conversions Ltd. - Sheffield
- Real Systems Controls Ltd - Oldham
- Red Dot Europe Ltd. - Ipswich
- Redmond O'Hanlon - Armagh
- Regam Electric Ltd - Leeds
- Reginald Maude Ltd. - Halifax
- Remsdaq Ltd. - Deeside
- Renelec Ltd - Devizes
- Renown Elec Co. - London
- Richard Strong - Tavistock
- Richards Addicott Electrics - Teignmouth
- Richfield Control Systems Ltd - Wolverhampton
- Ridley Bros of Gosforth - Newcastle upon Tyne
- Ridley Electronics Ltd - Salisbury
- Rigfone Electrics Ltd. - Southampton
- Risby Air Conditioning Co Ltd - Bourne End
- Riverside Industrial Equipment Ltd - Bridgend
- Rjc Projects (Engineering) Ltd. - Rushden
- Rjk Security Systems Ltd. - London
- Roadway Lighting Ltd - Manchester
- Robert Middleton Central Heating - Evesham
- Robert Prettie & Co. Ltd. - Bristol
- Roberts & Prowse (Swindon) Ltd. - Swindon
- Robertson Heating & Plumbing - Livingston
- Robin Cardwell - Belfast
- Robinson & Lawlor Ltd. - Nelson
- Rodell Mechanical Services Ltd. - Beckenham
- Rodgers (Services + Security) Ltd. - Glasgow
- Roger Budge (Electrical Engineering) Ltd - Boston
- Ron Clark Electrical & Sons - Bristol
- Ron Coldbeck - Manchester
- Rooms Cable Systems McR Ltd. - Manchester
- Rotary Northern Ltd - Newcastle upon Tyne
- Ryan Electrics - Reading
- S R I Electrical Distributors Ltd. - Leicester
- S & F Electrics - Littlehampton
- S C Telecom Services Ltd. - Gillingham
- S G D Security Ltd. - Cardiff
- S K Refrigeration & Air Conditioning Ltd. - Gloucester
- S M Chapman - Shoreham by Sea
- S Newis - Leeds
- S Pashley - Chesterfield
- SA Ductwork - Cardiff
- Safe & Sound Alarms - Manchester
- Safe & Sound Security Systems - Gravesend
- Safe Services - Galashiels
- Salix - Harrow
- Sapphire Research and Electronics Ltd - Ferndale
- Scannest Ltd. - Northampton
- Scion Electronics Ltd - Birmingham
- Scoffield Building Services (N I ) Ltd. - Belfast
- Scot-Vent Ltd. - Glasgow
- Scott's Plumbing Service - London
- Secure Us Solutions Ltd - Rickmansworth
- Securec Ltd. - Cannock
- Securicall - Tottenham
- Securitech - Beeston
- Security Monitoring Centres Ltd. - Nottingham
- Semco Building Services Ltd - Basingstoke
- Semtech Ltd. - Romsey
- Sensitive Data Systems Ltd - Canterbury
- Service Systems Ltd. - Newcastle
- Services Project Engineers - Pinner
- Sf Pipework Ltd. - London
- Sharp & Howse Ltd. - Oxford
- Shield Conservatories Ltd - Bolton
- Sim Ltd. - Glasgow
- Simon Hollywood - Penzance
- SISD ltd - Stevenage
- Sissons & Allen Ltd. - Leicester
- Sitecom 2000 Ltd - Carnforth
- Skanska Rashleigh Weatherfoil Ltd. - West Byfleet
- Skinners of Faversham (Electrical Contracting) Ltd. - Faversham
- Sky High Services - Ballater
- SMART421 Ltd. - Ipswich
- Smartlock Access Control Ltd - Aylesbury
- Sneddon and Richardson Ltd - Durham
- Snell D A - Enfield
- Solent Electrical Ltd. - Southampton
- Solo Security - Liverpool
- Sonder Heating & Ventilation Ltd - Mirfield
- Sonic Security Services Ltd. - Kettering
- Sonitech Systems Ltd. - Sandbach
- Soron Ltd. - Glasgow
- Sorrell Electrical - Cambridge
- Sound Associates - Molesey
- South Coast Alarms Ltd. - Weymouth
- South East Gates Ltd. - Ashford
- South Eastern Security - Folkestone
- Southern Heating & Ventilation Services - Bourne End
- Southern Refrigeration Services - Dorchester
- Southern Suspended Ceilings and Partitions Ltd - Southend on Sea
- Space Cooling Systems - Plymouth
- SparkTricity Ltd - Hounslow
- Specialized Security Products Ltd - Buntingford
- Speech and Data Communications - Leigh on Sea
- Stanley Security Solutions Ltd - Glasgow
- Steam Boilers (Leicester) Ltd. - Leicester
- Steele Electrics Ltd. - Christchurch
- Stenlakes Ltd - Launceston
- Steven Paul Contractors Ltd. - Bilston
- Stockton Heath Heating Ltd. - Warrington
- Stothers (M & E ) Ltd. - Belfast
- Streamline (Environmental Services) Ltd. - London
- Stroud Alarms - Stroud
- Surrey Boiler Services - South Croydon
- Suspended Ceiling Co. (Wales) Ltd. - Penarth
- Swancott & Son Ltd. - Smethwick
- Swann Services Group Ltd. - Tonbridge
- SWAT Security - Selby
- SWI Security Concepts - Market Harborough
- Swift Fire & Security Group Plc - Salford
- Swindon Security Systems - Swindon
- Switch Alarms - Manchester
- Synel Industries UK Ltd - Wembley
- Synthomer Ltd - Grimsby
- Synthomer Ltd - Ossett
- System 4 Services Ltd. - Nottingham
- Systems Integrators Ltd. - Teddington
- Systems Supported Ltd - Camberley
- T Clarke (Scotland) Ltd. - Falkirk
- T A Ronan & Sons Electrical Contractors Ltd. - London
- T G Baker (Sound) Ltd. - Clydebank
- T G Heating - Ilford
- T H White Installation Ltd. - Devizes
- T I Security Ltd. - Leeds
- T J Lift Solutions Ltd. - Darwen
- TAD Pipework Services Ltd - Wolverhampton
- Task Office Systems Ltd - Bolton
- Taybell Alarms Ltd. - Leeds
- Taylor Bros Installations (Bolton) Ltd - Bolton
- Tech-Gas Ltd - Bushey
- Techelec (Brighton) Ltd - Brighton
- Technical Alarm Systems Ltd - Southampton
- Techshare - Washington
- Tedd Engineering Ltd. - Ashbourne
- Tees Insulation (International) Ltd. - Hartlepool
- Telguard - Dorking
- Temporary Electrical Specialist & Testing Ltd. - Haverhill
- Thameside Electrical Ltd - Grays
- Tharby & Hampton Ltd. - Colchester
- The Electric Gate Co. Ltd. - Bristol
- The Electric Gate Shop - Sheffield
- The Evesham Alarm Co - Evesham
- The Freedom Group of Companies Ltd. - Wakefield
- The M E T Furnace Construction Co. Ltd. - London
- The Security Network Ltd - Ely
- Theme Traders Ltd. - London
- Thermotech Engineering Services (Scotland) Ltd. - Glasgow
- Thirteen Twenty Electrical Ltd. - Bradford
- Thomas & Wilson Ltd. - London
- Titan Elevators Ltd. - Bexley
- Tobel Sheet Metal Ltd. - Hailsham
- Tom Gallagher Ltd. - Bolton
- Tonagh Electrics Ltd. - Magherafelt
- Tormax UK Ltd - Walton on Thames
- Total Access (U K) Ltd. - Stafford
- Total Gas Services Ltd. - Coventry
- Tour Andover Controls Ltd - Ashby de la Zouch
- Townley Hughes & Co. Ltd. - Ellesmere Port
- TP Refrigeration and Air Conditioning Ltd - Leighton Buzzard
- Tradesmen Service Care Ltd. - Banchory
- Translec Ltd - Oldham
- Trevor Bacon Ltd. - Sheffield
- Trident Fire Protection Company Ltd - Dorking
- Trio Security Systems Ltd. - Romford
- Trojan Treatments Ltd. - Bristol
- Twyber Switchgear - Gloucester
- Tyler Scaffolding - Buntingford
- Tynetec Ltd. - Blyth
- Ultramatrix Production Services Ltd. - Bridgnorth
- Underwater Security Consultants Ltd. - London
- Unicorn Plumbing & Heating Ltd. - Faringdon
- Uniklamp Ltd - Wallingford
- Unipart Automotive Ltd. - Birmingham
- United Refrigeration - Nottingham
- Urmet Domus Communication & Security U K Ltd. - Braintree
- V C Dominey Electrical Services Ltd. - Poole
- Var Services Ltd. - Nottingham
- Veale-Nixon Ltd - Newcastle upon Tyne
- Veitchi Interiors Ltd. - Glasgow
- Velstone Inernational Ltd - Colchester
- Veltec Ltd - Jarrow
- Vent Clean & Services Ltd. - Dundee
- Videcom Security Ltd. - Waltham Abbey
- Videx Security Ltd - Newcastle upon Tyne
- Viessmann Ltd. - Telford
- VIP Group - Darlington
- Visual Blinds - Bradford
- Visual Effect Conservatories Ltd. - Mirfield
- Visual Surveillance Systems Ltd - Bradford
- Vitech Security Systems Ltd. - Tunbridge Wells
- Vocalvale Ltd. - Great Yarmouth
- Volkermatrix Ltd. - Middlesbrough
- Volkermatrix Ltd. - Middlesbrough
- Vysal Underfloor Heating Systems - Chippenham
- W Burns & Son (Electrical) Ltd. - Sheffield
- W Churches & Son Ltd. - Winchester
- W & M Services (Incorperating Spa Water Softners) Cheltenham - Alcester
- W F Barber - Chalfont St Giles
- W H Inman Ltd. - Lancaster
- W J Pollard Ltd. - Guildford
- Walker B & P - Northallerton
- Wally Mays (Contractors) Ltd. - Hull
- Walter Miles (Electrical Engineers) Ltd. - Leicester
- Waveney Security Ltd. - Bungay
- Weathermaster Garden Buildings Ltd. - Leeds
- Webley Heating - Bournemouth
- Weblight Ltd. - Ware
- Wei (Bristol) Ltd. - Bristol
- Wendwood Ltd. - Cannock
- West Mercia Security - Stourbridge
- West Riding Home Securities - Wakefield
- West Wales Heating Services - Swansea
- Westcott Refrigeration & Air Conditioning Ltd - Coventry
- Weston Heating Services - Bognor Regis
- Westronics Ltd. - Reading
- Westward Energy Services Ltd. - Swansea
- White R J & Son Ltd - Stourbridge
- Whittaker Bros Ltd. - Dudley
- Whitwam Ltd. - Winchester
- Whitwell & Sons - Blackpool
- Widewell Communications - Plymouth
- Wilhams Insulations Export Division Ltd - St Leonards on Sea
- Willey & Dalley - Exeter
- William Freer Ltd. - Leicester
- William Hill - Sidcup
- Wilson Bros (Sheffield) Ltd. - Sheffield
- Window & Door Blind Services Ltd. - Bridgnorth
- Window Store (Scotland) Ltd - Kirkcaldy
- Winkhaus (UK) Ltd - Kettering
- Wm & R W Bacon Ltd. - Wickford
- Woods F & I Plumbing & Heating Engineers - Bordon
- Woodside Air Conditioning Ltd - Birkenhead
- Worldmn Ltd - London
- Worsell Electrical Contractors Ltd. - Uckfield
- Worthing Boiler Services Ltd - Worthing
- WR Refrigeration Ltd - Edinburgh
- WR Refrigeration Ltd - Chelmsford
- WR Refrigeration Ltd - Stockton on Tees
- Wr Refrigeration Ltd. - Leicester
- Wright Favell Ltd. - Leicester
- Wright Guard Security Systems & Electrical - Mansfield
- Wymondham Heating Services - Wymondham
- York Refrigeration - Wallasey
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