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County Index - Middlesex
- K.C.E Ltd - Middlesex - Uxbridge
- . A Space Station Plc - Middlesex - Brentford
- 001 Computer Services - Middlesex - Harrow
- 020 Ltd - Middlesex - Twickenham
- 1 2 3 Bounce - Middlesex - Harrow
- 1ST Able Locksmith - Middlesex - Stanmore
- 1st car alarms - Middlesex - Ruislip
- 1st Handsfree - Middlesex - Ruislip
- 1ST Point Ltd - Middlesex - Ruislip
- 2D: 3D Ltd. - Middlesex - Wembley
- 2ND Sight Ltd - Middlesex - Staines
- 3 R Enterprises - Middlesex - Greenford
- 360 G S P College Ltd - Middlesex - Wembley
- 360 Vision Ltd. - Middlesex - Pinner
- 3PAR Ltd - Middlesex - Staines
- 4LEISURE Recruitment - Middlesex - Uxbridge
- 4SECURE Ltd. - Middlesex - Harrow
- 4UPC Ltd - Middlesex - Stanmore
- 5 Star Limousines Ltd - Middlesex - Uxbridge
- 5TH Generation Designs Ltd - Middlesex - Twickenham
- @Its (Search & Selection) Ltd - Middlesex - Twickenham
- A A Ropes & Slings Ltd. - Middlesex - Feltham
- A Doran Contractors Ltd - Middlesex - Wembley
- A Doran Plant Ltd - Middlesex - Harrow
- A Sullivan (Builders) Ltd. - Middlesex - Teddington
- A & A Hogan Ltd. - Middlesex - Hounslow
- A & A Recycling Ltd - Middlesex - Harrow
- A & B Selectencies - Middlesex - Feltham
- A & C Ltd. - Middlesex - Harrow
- A & D Lifts - Middlesex - Edgware
- A & G Services (Uk) Ltd - Middlesex - Greenford
- A & J Locksmiths - Middlesex - Hayes
- A & J Stanton - Middlesex - Wembley
- A & R Plumbing Supplies Ltd - Middlesex - Enfield
- A & V Contracting Ltd. - Middlesex - Isleworth
- A 24 Hour Emergency Locksmith Locksmiths Open 24 H - Middlesex - Staines
- A 4 All Appliances Ltd - Middlesex - Wembley
- A A A Autos - Middlesex - Harrow
- A and M Fencing Company Ltd - Middlesex - Uxbridge
- A B C Catering Equipment Supplies - Middlesex - Edgware
- A B C Ceramics - Middlesex - Hayes
- A B C Registers - Middlesex - Stanmore
- A B Car Air Conditioning - Middlesex - Isleworth
- A B I Design - Middlesex - Wembley
- A B S & Sons - Middlesex - Southall
- A Bounce & Ride - Middlesex - Ashford
- A Boyall Ltd. - Middlesex - Hampton
- A C Electrical Wholesale Ltd (West Drayton) - Middlesex - West Drayton
- A C Hughes Ltd. - Middlesex - Hampton
- A C Pumps Ltd - Middlesex - Enfield
- A C Nicholas Ltd. - Middlesex - Enfield
- A C Stoneworks - Middlesex - Enfield
- A Cars - Middlesex - Feltham
- A Cleaning Contractors (London) Ltd - Middlesex - Southall
- A D F Furnishings Ltd - Middlesex - Greenford
- A D K Kooling Ltd - Middlesex - Wembley
- A D R Engineering Ltd. - Middlesex - Uxbridge
- A E Procter Ltd. - Middlesex - Feltham
- A Elfes Ltd. - Middlesex - Edgware
- A G O Services - Middlesex - Hounslow
- A H Consultancy Services Ltd. - Middlesex - Southall
- A I T Recorders Ltd. - Middlesex - Twickenham
- A J O'Connor Ltd. - Middlesex - Enfield
- A J Brockwitz & Sons - Middlesex - Harrow
- A J Darling & Sons Ltd. - Middlesex - Twickenham
- A J Entertainments - Middlesex - Harrow
- A K Newman - Middlesex - Enfield
- A L S Construction Ltd. - Middlesex - Harrow
- A M Homeclean - Middlesex - Greenford
- A M R - Middlesex - Isleworth
- A M S Pumps & Controls (Brentford) - Middlesex - Brentford
- A M Services - Middlesex - Harrow
- A M Talbot Ltd - Middlesex - Hayes
- A M Y Building Services - Middlesex - Hampton
- A N A Nursing Agency - Middlesex - Edgware
- A N T Communications Ltd - Middlesex - Ruislip
- A Novo UK Ltd - Middlesex - Enfield
- A One Precision Engineers - Middlesex - Hounslow
- A P T Air Conditioning Services Ltd. - Middlesex - Ashford
- A P W Engineering Co - Middlesex - Greenford
- A Price Ltd - Middlesex - Teddington
- A Q Qurashi Architects - Middlesex - Hounslow
- A R K Heating Suppliers Ltd. - Middlesex - Isleworth
- A R V O Sales Ltd - Middlesex - Edgware
- A R Valli & Sons - Middlesex - Uxbridge
- A S Carpentry - Middlesex - Feltham
- A S Law Practice - Middlesex - Harrow
- A S Transport - Middlesex - Hounslow
- A T & T (G B) Ltd - Middlesex - Brentford
- A Taylor Agency - Middlesex - Enfield
- A to Z Computers - Middlesex - Twickenham
- A V Sales (Europe) Ltd. - Middlesex - Ashford
- A V Wells French Polishing Contractors - Middlesex - Northolt
- A Z Reliant - Middlesex - Wembley
- A-Limo-Scene - Middlesex - Wembley
- A-Z Computer Services - Middlesex - Twickenham
- A-Z Reliant Catering Equipment Hire - Middlesex - Wembley
- A. McKenzie Carpentry Services - Middlesex - Stanmore
- A.O.R. (Europe) Ltd - Middlesex - Southall
- A.S.L. Personnel Ltd - Middlesex - Sunbury on Thames
- A1 Building Services - Middlesex - Enfield
- A1 Cash & Carry - Middlesex - Harrow
- A1 Furniture - Middlesex - Enfield
- A1 Laboratory Supplies Ltd - Middlesex - Enfield
- A3 Architects Ltd. - Middlesex - Pinner
- A40 Packaging - Middlesex - Greenford
- A40 Packaging Ltd - Middlesex - Greenford
- Aa Computer Services - Middlesex - Northwood
- Aa Heathrow Cars Ltd - Middlesex - Hayes
- AA Telecom Ltd - Middlesex - Sunbury on Thames
- Aaa Limousines - Middlesex - Staines
- Aandatta Ltd. - Middlesex - Harrow
- AAP Solutions - Middlesex - Hounslow
- Aar International Inc - Middlesex - Hounslow
- Aaren Technology - Middlesex - Ruislip
- Aaron Gates & Railings - Middlesex - Uxbridge
- Aayush Ltd - Middlesex - Harrow
- Ab Superstore Ltd - Middlesex - Hayes
- Abacus Optical Ltd. - Middlesex - Northwood
- Abacus Specialist Plasterwork - Middlesex - Edgware
- Abbey Cards - Middlesex - Hayes
- Abbeygate Drain Care Ltd. - Middlesex - Ashford
- Abbeygate Supplies - Middlesex - Harrow
- Abbeywood Developments Ltd - Middlesex - Sunbury on Thames
- Abbtex Sportswear - Middlesex - Harrow
- ABC - Middlesex - Edgware
- Abc Home Care Services - Middlesex - Harrow
- Abcnet Internet Services Ltd. - Middlesex - Harrow
- Aben Wines Ltd - Middlesex - Wembley
- Abhicom Electronics Ltd - Middlesex - Harrow
- Abi Diamond - Middlesex - Harrow
- Ability Security Systems Ltd - Middlesex - Edgware
- Able Airport Cars Ltd - Middlesex - Southall
- Able Pcu Industries Llc - Middlesex - Brentford
- Able Plant Services Ltd. - Middlesex - Harrow
- About Signs - Middlesex - Feltham
- Absolute Building Ltd - Middlesex - Stanmore
- Absolute Electronics Ltd - Middlesex - Staines
- Absolute Garments Ltd - Middlesex - Harrow
- Absolute Graphics - Middlesex - Uxbridge
- Absolute Home Security - Middlesex - Enfield
- Absolute Hospitality Ltd. - Middlesex - Hounslow
- Abtech Services - Middlesex - West Drayton
- Aca Security - Middlesex - Isleworth
- Academy Associates Uk Ltd - Middlesex - Hounslow
- Accessories by Designs Ltd - Middlesex - Ruislip
- Accord Healthcare Ltd - Middlesex - Harrow
- Accountancy Advisory Services - Middlesex - Hounslow
- Accuity - Middlesex - Hampton
- Accurocare Ltd - Middlesex - Hayes
- Accuver Emea Ltd - Middlesex - Harrow
- Ace Awards - Middlesex - Stanmore
- Ace Catering Hire - Middlesex - Staines
- Ace Refrigeration - Middlesex - Wembley
- Acer UK Ltd - Middlesex - West Drayton
- Aces Fans Ltd. - Middlesex - Northwood
- Aciers Uk Ltd - Middlesex - Feltham
- Aciers UK Ltd - Middlesex - Feltham
- Acorn Consulting Ltd - Middlesex - Brentford
- Acorn Engraving Co - Middlesex - Hayes
- Acorn Equipment Co. Ltd. - Middlesex - Stanmore
- Acorn Precision Components Ltd - Middlesex - Uxbridge
- Acs Consultants Ltd. - Middlesex - Harrow
- Acs Professionals in Construction Ltd. - Middlesex - Wembley
- Act Teleconferencing Ltd. - Middlesex - Harrow
- Actest Ltd - Middlesex - Enfield
- Action Cars Ltd. - Middlesex - Harrow
- Action Graphics Ltd - Middlesex - Twickenham
- Action Signs & Graphics - Middlesex - Harrow
- Active Networks Ltd. - Middlesex - Staines
- Acton Bright Steel Ltd - Middlesex - Staines
- Actua International Ltd. - Middlesex - Enfield
- Acturus Ltd - Middlesex - Twickenham
- Acutext - Middlesex - Northolt
- Adams & Oliver Ltd. - Middlesex - Staines
- Adapted Vehicle Hire Ltd - Middlesex - Uxbridge
- Add Agency Ltd - Middlesex - Teddington
- Add Contracting Ltd - Middlesex - Brentford
- Addey & Son (Western International) Ltd - Middlesex - Southall
- Addzim Solutions Ltd - Middlesex - Edgware
- Adecco - Middlesex - Enfield
- Adecco Alfred Marks (Enfield) - Middlesex - Enfield
- Adecco Alfred Marks (Staines) - Middlesex - Staines
- Adecco Alfred Marks (Uxbridge) (Uxbridge) - Middlesex - Uxbridge
- Adecco U K Ltd (Harrow) - Middlesex - Harrow
- Adelbrent Engineers Ltd. - Middlesex - Northwood
- Adepsys Ltd - Middlesex - Harrow
- Adex Systems Ltd - Middlesex - Pinner
- Adlink UK Ltd - Middlesex - Wembley
- Adlink Uk Ltd (Wembley) - Middlesex - Wembley
- Adlink Uk Ltd. - Middlesex - Wembley
- Admiral Microwaves Ltd - Middlesex - Ruislip
- ADR Engineering Ltd - Middlesex - Uxbridge
- ADT Fire and Security plc - Middlesex - Sunbury on Thames
- Adtec Europe Ltd. - Middlesex - Hounslow
- Advance Process Fabrications Ltd. - Middlesex - Isleworth
- Advance Seating Designs T/as Fabrique Du Metal Ltd - Middlesex - Greenford
- Advanced Business Equipment Ltd. - Middlesex - Uxbridge
- Advanced Dortech - Middlesex - Uxbridge
- Advanced Property Services Ltd - Middlesex - Staines
- Advanced Solutions Ltd. - Middlesex - Greenford
- Advancefirst Technologies Ltd - Middlesex - Shepperton
- Advertising Software Ltd - Middlesex - Ruislip
- AEG Power Solutions Ltd (formerly Saft Power Systems Ltd) - Middlesex - Enfield
- Ael Infosys Ltd. - Middlesex - Harrow
- Aero Scaffolding Ltd - Middlesex - Feltham
- Aerodyne Equipment - Middlesex - Greenford
- Aerofoam Ltd. - Middlesex - Stanmore
- Aerospares 2000 Ltd - Middlesex - Harrow
- Aerospheres (U K) Ltd. - Middlesex - Harrow
- Affinity Crew Ltd. - Middlesex - Twickenham
- Affordable Hearing Care - Middlesex - Ruislip
- Affordable Repairs & Spares Ford Specialist - Middlesex - Wembley
- Afghan Bazaar - Middlesex - Edgware
- Afm Metrology Services Ltd. - Middlesex - Ashford
- Aftec LHR Ltd - Middlesex - Staines
- Afton Trading Ltd - Middlesex - Twickenham
- Agb Systems Ltd - Middlesex - Edgware
- Age Computer Services Ltd - Middlesex - Isleworth
- Agency Sector Management (UK) Ltd - Middlesex - Staines
- Agfa-Gevaert Ltd - Middlesex - Brentford
- Aggregate Industries Uk Ltd. - Middlesex - West Drayton
- Agile Data Ltd - Middlesex - Ashford
- Agri-Chemicals Ltd. - Middlesex - Wembley
- Ahl Property Ltd - Middlesex - Edgware
- Ahmed Exotic Ltd - Middlesex - Southall
- Aim Builders Ltd. - Middlesex - Uxbridge
- Aimer Products Ltd - Middlesex - Enfield
- Air Cargo Services Ltd - Middlesex - Staines
- Air Controlled Environmental Systems Ltd. - Middlesex - Uxbridge
- Air Products Plc (Southall) - Middlesex - Southall
- Air-Fab (Manufacturing) Ltd. - Middlesex - Feltham
- Air-Sea Packing Group Ltd. - Middlesex - Twickenham
- Airbase Gse Ltd - Middlesex - Staines
- Aircraft Components & Equipment - Middlesex - Shepperton
- Aircraft Procurement Solutions Ltd - Middlesex - Harrow
- Airduct Engineering Co. - Middlesex - Feltham
- Airforms Ltd. - Middlesex - Ashford
- Airline Tariff Publishing Co. - Middlesex - Hounslow
- Airports Bureau Systems Ltd. - Middlesex - Ashford
- Airscrew Ltd - Middlesex - Sunbury on Thames
- Aj's Air Conditioning Services - Middlesex - Enfield
- Aja Ltd. - Middlesex - Twickenham
- Ajay Business Centres Ltd. - Middlesex - Wembley
- Ajay Enterprises Ltd - Middlesex - Twickenham
- AJB Project Services Ltd - Middlesex - Hayes
- Ajb Waste Disposal - Middlesex - Ashford
- Ajk Furnishings - Middlesex - Enfield
- Akaal Trading Ltd - Middlesex - Southall
- Akamai Technologies Ltd - Middlesex - Staines
- Akenstone Berkeley Ltd. - Middlesex - Northwood
- Aks It Services Ltd - Middlesex - Hounslow
- Akshar Infotech Ltd - Middlesex - Harrow
- Al Abbas - Middlesex - Southall
- Al-Anaka Ltd - Middlesex - Harrow
- Al-Falah Foods Ltd - Middlesex - Harrow
- Al-Falah Halal Foods Ltd. - Middlesex - Greenford
- Al-Vilal Store - Middlesex - Wembley
- Alan Bowden - Middlesex - Feltham
- Alan C Ford Ltd. - Middlesex - Northwood
- Alan Dale Pumps Ltd. - Middlesex - Ashford
- Alan Hannah Ltd - Middlesex - Enfield
- Alan Morris Ltd - Middlesex - Ruislip
- Alan Simons Contracts - Middlesex - Edgware
- Albany Cleaning Supplies - Middlesex - Feltham
- Albany Furnishings - Middlesex - Stanmore
- Albany Properties (Enfield) Ltd - Middlesex - Enfield
- Albe (England) Ltd. - Middlesex - Greenford
- Albion Water Ltd. - Middlesex - Teddington
- Albro Windows Ltd. - Middlesex - Harrow
- Alder Roofing Supplies Ltd - Middlesex - Ashford
- Alert Cctv Systems - Middlesex - Enfield
- Alexander Hire - Middlesex - Ashford
- Alexander Partners - Middlesex - Hayes
- Alexandra Locksmiths Ltd - Middlesex - Enfield
- Alfa Foods Distribution Ltd - Middlesex - Greenford
- Alfred Ashley Group Ltd. - Middlesex - Northwood
- Alfred Ashley Ltd - Middlesex - Northwood
- Alfred Bagnall & Sons (London) Ltd. - Middlesex - Teddington
- Algebra Tv - Middlesex - Twickenham
- Aljac Fuelling Components Ltd. - Middlesex - Shepperton
- All Brickwork - Middlesex - Northolt
- All Containers Ltd. - Middlesex - Pinner
- All County Developments Ltd - Middlesex - Shepperton
- All Day Recruitment Ltd. - Middlesex - Northwood
- All Metal Services Ltd. - Middlesex - West Drayton
- Allday Rubbish Clearance - Middlesex - Harrow
- Alldoor Systems Ltd - Middlesex - Hounslow
- Alldur Building Consultancy Estimating Services - Middlesex - Uxbridge
- Allegro Blinds - Middlesex - St Albans
- Allen Marmot (European) Ltd. - Middlesex - Edgware
- Allens Catering Hire Services Ltd. - Middlesex - Southall
- Allied Furnishing Supplies Ltd - Middlesex - Enfield
- Allied Office Furniture - Middlesex - Uxbridge
- Allipharm (Uk) Ltd. - Middlesex - Enfield
- Allparts Automotive (Enfield) - Middlesex - Enfield
- Allparts Automotive (Hayes) - Middlesex - Hayes
- Allpex Ltd - Middlesex - Wembley
- Allpoint Packaging Ltd - Middlesex - Hayes
- Allweather Clothing Ltd. - Middlesex - Hayes
- Almar Industrial Supplies Ltd - Middlesex - West Drayton
- Almedia I T Services Ltd. - Middlesex - Wembley
- Almeida Rugs Ltd - Middlesex - Southall
- Almik Signs Ltd. - Middlesex - Greenford
- Alnoor Foods Ltd. - Middlesex - Southall
- ALOHA9 - Middlesex - Northwood
- Alperton - Middlesex - Wembley
- Alpha Biotech Ltd - Middlesex - Uxbridge
- Alpha Building & Construction - Middlesex - West Drayton
- Alpha Computer Services (U K) Ltd - Middlesex - Edgware
- Alpha Digital Solutions Ltd. - Middlesex - Uxbridge
- Alpha Wire International - Middlesex - Sunbury on Thames
- Alphacomp (Uk) Ltd - Middlesex - Hounslow
- Alphatron Trading Ltd - Middlesex - Hampton
- Alroc Ltd - Middlesex - Enfield
- Alsford Timber Traders (Feltham) - Middlesex - Feltham
- Alternative Resources Ltd - Middlesex - Shepperton
- Altitude Scaffolding Ltd - Middlesex - Uxbridge
- Altroy Ltd - Middlesex - Ruislip
- Altus Edwin Hill M25 West Office - Middlesex - West Drayton
- Am Computers - Middlesex - Harrow
- Am Resources Ltd - Middlesex - Twickenham
- Am-Safe Ltd. - Middlesex - Hounslow
- Amar Thomas Associates Ltd - Middlesex - Teddington
- Amax Security Ltd. - Middlesex - Harrow
- Amazing Internet Ltd - Middlesex - Twickenham
- Ambassador's of London Ltd. - Middlesex - Wembley
- Ambassadors of Sound - Middlesex - Hayes
- Amber Enterprises (London) Ltd - Middlesex - Harrow
- Amber Safetywear Ltd - Middlesex - Edgware
- Amberworks Twickenham Ltd - Middlesex - Isleworth
- Ambit International Ltd. - Middlesex - Enfield
- Ambush Security Systems Ltd - Middlesex - Uxbridge
- Amek Electrical Services - Middlesex - Brentford
- American Medical Systems U K Ltd. - Middlesex - Brentford
- Amery Construction Ltd - Middlesex - Wembley
- Amesplan Ltd - Middlesex - Southall
- Ammoura Ltd - Middlesex - Wembley
- Amoroma Ltd - Middlesex - Southall
- Amotech Europe Ltd. - Middlesex - Wembley
- AMPAC Trading Ltd - Middlesex - Harrow
- Amplifon (Harrow) - Middlesex - Harrow
- Amplivox + Ultratone Hearing Care Centre (Harrow) - Middlesex - Harrow
- Anadarko Algeria Co. Llc - Middlesex - Uxbridge
- Analytic Ltd. - Middlesex - Teddington
- Analytics SEO - Middlesex - London
- Anatolian Tiles - Middlesex - Enfield
- Anchor Plastics Machinery Ltd. - Middlesex - Uxbridge
- Andrea O'Grady - Middlesex - Ashford
- Andrew Day - Middlesex - Greenford
- Andrew Turner & Co Ltd - Middlesex - Uxbridge
- Andrews Cameras - Middlesex - Teddington
- Andrik & Chorleywood Press - Middlesex - Pinner
- Andromica Video Systems Ltd. - Middlesex - Uxbridge
- Andy Clark (Developments) Ltd. - Middlesex - Northwood
- Andytruc Ltd. - Middlesex - West Drayton
- Angel Case & Packing Co. Ltd. - Middlesex - Hounslow
- Angel Joinery Handmade Kitchens - Middlesex - Hampton
- Angel Trimmings Ltd. - Middlesex - Enfield
- Anglo Aquarium Plant Co. Ltd. - Middlesex - Enfield
- Anglo-Dal Ltd. - Middlesex - Edgware
- Angus Smith Equine Dental Technician - Middlesex - Enfield
- Animated Extras International Ltd - Middlesex - Shepperton
- Anixter International Ltd. - Middlesex - Uxbridge
- Ankur Precision Engineering Ltd. - Middlesex - Uxbridge
- Anlco Ltd. - Middlesex - Ruislip
- Anlin Ltd - Middlesex - Edgware
- Anna Valley Displays Ltd - Middlesex - Hampton
- Annessa Imports Ltd. - Middlesex - Enfield
- Ansett Aircraft Spares & Services Ltd. - Middlesex - Hounslow
- Anthony Fieldhouse & Co - Middlesex - Greenford
- Anthony J Blythe & Co - Middlesex - Pinner
- Anuva International Ltd - Middlesex - Pinner
- Anykey Locksmiths - Middlesex - Northolt
- Anytime Concrete - Middlesex - Greenford
- Anzed Computer Services Ltd. - Middlesex - Harrow
- AP Technology Ltd - Middlesex - Hayes
- Apache Engineering - Middlesex - Sunbury on Thames
- Apex Project Services - Middlesex - Stanmore
- Apex Solutions & Technologies Ltd - Middlesex - Hounslow
- Apl Logistics Europe B V - Middlesex - Uxbridge
- Apna Marquees - Middlesex - Hounslow
- Apollo Video - Middlesex - Southall
- Apollotek Ltd - Middlesex - Sunbury on Thames
- Apple Catering Hire - Middlesex - Edgware
- Apple Press - Middlesex - Uxbridge
- Apple Xemplar Education Ltd - Middlesex - Uxbridge
- Applebee Exports Ltd - Middlesex - Feltham
- Applejack Trading Co. - Middlesex - Pinner
- Applewoods Hydroponica - Middlesex - Brentford
- Applied Acoustic Design Ltd - Middlesex - Staines
- Apropa Machinery Ltd. - Middlesex - Wembley
- Apt Controls Ltd. - Middlesex - Harrow
- Aptus Personnel Ltd (Enfield) (Enfield) - Middlesex - Enfield
- Aqq Ltd. - Middlesex - Hounslow
- Aqualite Trading Ltd - Middlesex - Wembley
- Aquapure - Middlesex - Twickenham
- Aquapurge Ltd - Middlesex - Hayes
- Aquazone - Middlesex - Uxbridge
- AR Valli and Sons - Middlesex - Uxbridge
- Aram Design - Middlesex - Wembley
- Arandale Couriers - Middlesex - West Drayton
- Arc Fabrications Ltd - Middlesex - Wembley
- Arcade Productions (Riwaq) Ltd - Middlesex - Isleworth
- Arcadia Building Contracts Ltd - Middlesex - London
- Archipel Ltd - Middlesex - Harrow
- Architectural Lighting Works Ltd - Middlesex - Hayes
- Architecture : Wk Ltd - Middlesex - Teddington
- Archmill Ltd - Middlesex - Harrow
- Arcit Ltd - Middlesex - Northwood
- Arco Direct - Middlesex - Pinner
- Arcode Uk Ltd. - Middlesex - Harrow
- Arctic Chilled Foods Ltd - Middlesex - Wembley
- ARD Systems Ltd - Middlesex - Enfield
- Ardmore Construction Ltd. - Middlesex - Enfield
- Area Grab Hire - Middlesex - West Drayton
- Areatrade Advertising Ltd - Middlesex - Enfield
- Argent Litho Ltd. - Middlesex - Wembley
- Argenta Aora Ltd - Middlesex - Pinner
- Ari Installations Ltd. - Middlesex - Wembley
- Ari Medical Supplies Co. Ltd. - Middlesex - Harrow
- Aria Computers - Middlesex - Uxbridge
- Aristocrat Technologies Europe Ltd - Middlesex - Uxbridge
- Ark Creative Ltd - Middlesex - Enfield
- Ark Electrical Services Ltd - Middlesex - Hayes
- Armored Auto Uk Ltd. - Middlesex - Brentford
- Armour Security (London) Ltd - Middlesex - Enfield
- Armstrong Metal Ceilings Ltd. - Middlesex - Uxbridge
- Armstrong World Industries Ltd. - Middlesex - Uxbridge
- Aroma Coffee - Middlesex - Southall
- Aroma Cosmetics Ltd - Middlesex - Wembley
- Aroma Janitorial Supplies - Middlesex - Feltham
- Aromair Ltd. - Middlesex - Shepperton
- Aromatherapy Associates Ltd - Middlesex - Brentford
- Arotec Neon Signs Ltd. - Middlesex - Enfield
- Arpia Facilities - Middlesex - Ashford
- Arri Rental Ltd - Middlesex - Uxbridge
- Arrow Coated Products (Uk) Ltd - Middlesex - Harrow
- Arsanit Ltd - Middlesex - Wembley
- Art and Picture Framing By Saryan - Middlesex - Pinner
- Artech Systems - Middlesex - Ashford
- Artek Display Ltd. - Middlesex - Harrow
- Artem Ltd. - Middlesex - Greenford
- Arthur Sanderson and Sons Ltd - Middlesex - Uxbridge
- Artisan Tiles - Middlesex - Shepperton
- Artistic Licence Intergration - Middlesex - Harrow
- Arty Wig Designs - Middlesex - Northolt
- Arty Wigs Display - Middlesex - Northolt
- Arun Associates Ltd. - Middlesex - Edgware
- Arvind Worldwide (M) Inc - Middlesex - Harrow
- Asap Temporaries Ltd - Middlesex - Greenford
- Ascendancy Media Ltd - Middlesex - Stanmore
- Asfare No 1 Ltd - Middlesex - Ruislip
- Ash Data Systems Ltd - Middlesex - Northwood
- Ash Hair Design Ltd - Middlesex - Northolt
- Ashbuild Ltd. - Middlesex - Wembley
- Ashco Accountants Ltd - Middlesex - Edgware
- Ashford Engineering & Trading Ltd. - Middlesex - Ashford
- Ashford Environmental Services Ltd. - Middlesex - Staines
- Ashford Heating Supplies Ltd - Middlesex - Staines
- Ashford Luxury Coaches (Middlesex) Ltd - Middlesex - Feltham
- Ashjan Ltd. - Middlesex - Harrow
- Ashley Cleaning Services Ltd - Middlesex - Enfield
- Ashprint (London) Ltd - Middlesex - Wembley
- Asian Traders Ltd - Middlesex - Southall
- Askool Air Conditioning - Middlesex - Hayes
- Aspect Commercial Wheels Ltd - Middlesex - Uxbridge
- Aspect Commercial Wheels Ltd - Middlesex - Uxbridge
- Aspect Software Uk Ltd - Middlesex - Uxbridge
- Aspen Electronics Ltd - Middlesex - Ruislip
- Asper Marble & Granite Ltd - Middlesex - Hounslow
- Assessment Selection & Psychology Ltd. - Middlesex - Isleworth
- Asset ID Ltd - Middlesex - Shepperton
- Assetco Engineering Ltd. - Middlesex - Ruislip
- Assign Technology - Middlesex - Greenford
- Associated Air Services Ltd. - Middlesex - Feltham
- Astellas Pharma Europe Ltd. - Middlesex - Staines
- Aston Colour Press Ltd - Middlesex - Twickenham
- Aston Cord Ltd - Middlesex - Sunbury on Thames
- Aston Manufacturing Co. Ltd. - Middlesex - Twickenham
- Astra Infotech Ltd - Middlesex - Hounslow
- Atkins Property Maintenance - Middlesex - Isleworth
- Atlas Coaches Ltd. - Middlesex - Harrow
- Atlas Express Ltd. - Middlesex - Southall
- Attachmate Sales U K Ltd. - Middlesex - Staines
- Attenda Group Finance Ltd - Middlesex - Staines
- Attenda Group Ltd. - Middlesex - Staines
- Attewell Ltd - Middlesex - Hayes
- Attwood Baker - Middlesex - Teddington
- Atu Computers Ltd - Middlesex - Enfield
- Atul Designs Ltd. - Middlesex - Pinner
- Au Pair Plus - Middlesex - Edgware
- Au Pairs & Nannies Direct - Middlesex - Edgware
- Au Pairs Plus - Middlesex - Stanmore
- Auden McKenzie (Pharma Division) Ltd. - Middlesex - Ruislip
- Audio Digital Technology Ltd - Middlesex - Teddington
- Audio Marketing (U K) Ltd - Middlesex - Wembley
- Audio Related Technology Ltd - Middlesex - Wembley
- Audio Solutions Ltd - Middlesex - Edgware
- Auping Uk Ltd - Middlesex - Harrow
- Australian Portfolio Wines (Uk) Ltd - Middlesex - Stanmore
- Auto 4 Ltd. - Middlesex - Southall
- Auto Soft Uk Ltd. - Middlesex - Hounslow
- AutoAero - Middlesex - Staines
- Autocar Magazine - Middlesex - Teddington
- Autoleaseplan - Middlesex - Hounslow
- Automatic Entry Systems Ltd - Middlesex - Uxbridge
- Automatic Transmission Centre - Middlesex - Southall
- Automobile Trimmings Co. - Middlesex - Stanmore
- Automotive Software - Middlesex - Hayes
- Autospark (U K) Ltd - Middlesex - Wembley
- Autosport Bearings & Components Ltd. - Middlesex - Shepperton
- Autumn Precision Engineering Ltd. - Middlesex - Hounslow
- AVA Packaging Solutions Ltd - Middlesex - Uxbridge
- Avalon Trading Ltd - Middlesex - Hounslow
- Avatan Handling Equipment - Middlesex - Pinner
- Avery Flight Interiors Ltd - Middlesex - Feltham
- Aviamax Ltd. - Middlesex - Isleworth
- Aviation & Business Strategy Consulting Ltd - Middlesex - Edgware
- Aviation Fuel Services Ltd. - Middlesex - Hounslow
- Aviation Resource - Middlesex - Hounslow
- Aviserv Ltd. - Middlesex - West Drayton
- Avondale Systems Ltd. - Middlesex - Twickenham
- Avonville Ltd - Middlesex - Northwood
- Avro Systems Technology Ltd. - Middlesex - Northolt
- AVS - Middlesex - Harrow
- AWARE - Middlesex - Stanmore
- Awnhill Ltd - Middlesex - Northolt
- Axdro Bpo Ltd. - Middlesex - Wembley
- Axiom Software Solutions Ltd - Middlesex - Edgware
- Axis Films Ltd. - Middlesex - Shepperton
- Ayurvedic Herbals Ltd - Middlesex - Harrow
- Az Electronic Materials Services Ltd - Middlesex - Uxbridge
- Azads Timber & Builder Merchants - Middlesex - Wembley
- Azagury Designs - Middlesex - Enfield
- Azko Ltd - Middlesex - Ruislip
- Aztec Computing Ltd - Middlesex - Pinner
- Aztec Group (Uk) Ltd. - Middlesex - Uxbridge
- Aztec Modelmakers Ltd - Middlesex - Teddington
- B & N Building Services Ltd - Middlesex - Pinner
- B Bounced Ltd. - Middlesex - Uxbridge
- B D 2000 Ltd. - Middlesex - Brentford
- B & B Timber & Builders Merchants - Middlesex - Southall
- B & E Barrett - Middlesex - Uxbridge
- B & J Plumbing & Heating Supplies Co. (Greenford) - Middlesex - Greenford
- B & R Coaches - Middlesex - Southall
- B & S Durbin Ltd - Middlesex - Harrow
- B & S Fruits - Middlesex - Southall
- B & S Fruits (Southall) - Middlesex - Southall
- B A C Exports - Middlesex - Hounslow
- B and G Bathroom Show Centre, The - Middlesex - Teddington
- B and M Glassing Lmtd - Middlesex - Harrow
- B and S Steel Supplies Ltd - Middlesex - Northolt
- B C M Group P L C - Middlesex - Isleworth
- B C P Premier - Middlesex - Edgware
- B C P Premier - Middlesex - Harrow
- B D C Electrical Goods - Middlesex - Hayes
- B D Tools - Middlesex - Edgware
- B E W Electrical Distributors Ltd (West Drayton) - Middlesex - West Drayton
- B Elliott Demolition - Middlesex - Shepperton
- B F A Recycling - Middlesex - Uxbridge
- B F R S (Uk) Ltd - Middlesex - Hayes
- B G M P Ltd - Middlesex - Uxbridge
- B I G Group - Middlesex - Teddington
- B J S Co. Ltd. - Middlesex - Greenford
- B J Wood & Son - Middlesex - Isleworth
- B L Joshi Uk Ltd. - Middlesex - Wembley
- B L Fidgen & Co. Ltd. - Middlesex - Uxbridge
- B M Polyco Ltd. - Middlesex - Enfield
- B O C Gases (Wembley) (Wembley) - Middlesex - Wembley
- B P Chemicals Ltd - Middlesex - Sunbury on Thames
- B S B Construction - Middlesex - Staines
- B S M Design Build - Middlesex - Hounslow
- B S S (U K) - Middlesex - Brentford
- B S Sales - Middlesex - Edgware
- B T C Group - Middlesex - Hayes
- B T M Print Ltd. - Middlesex - Edgware
- B T M Marble & Granite Ltd. - Middlesex - Wembley
- B V M Services Ltd. - Middlesex - Wembley
- B W S Architecture - Middlesex - Harrow
- B-I2I - Middlesex - Northwood
- B2X Uk Ltd - Middlesex - Southall
- Babycity - Middlesex - Northolt
- Bafcrown Computers Ltd - Middlesex - Northwood
- Bagbase International Ltd. - Middlesex - Wembley