§ Company
- Add-on Electronics
- Aero Electronics (AEL) Limited
- Aeronautical & General Instruments PLC
- AFA-Minerva Limited (Thorn EMI Electronics Limited)
- Airborne Industries Limited
- Air-Log Limited
- Airscrew Howden Limited
- Airwork Limited
- P. W. Allen & Company
- Alvis Limited
- APV Hall International Limited
- Aveling-Barford Limited
- Avimo Limited
- Avon Inflatables Limited
- Barr & Stroud Limited
- Beaufort (Air-Sea) Equipment Limited
- Bestobell Engineering Products Limited
- Bridport Aviation Products Limited
- Bristol Composite Materials Engineering Limited
- Bristol Uniforms Limited
- British Aerospace plc—Aircraft Group
- British Aerospace plc—Dynamics Group
- The British Aluminium Company Limited
- British Manufacture & Research Company Limited
- British Shipbuilders
- David Brown Gear Industries Limited
- S. G. Brown Limited
- Cherring plc
- Cheverton Workboats
- Chloride Group plc
- NEI Clarke Chapman Engineering Limited
- Compair Industrial Limited (Reavell & Co. Ltd.)
- Cossor Electronics Limited
- CQC Limited
- Crane Fruehauf Limited
- Dale Electric of Great Britain Limited
- S. Davall & Sons Limited
- Dowty Group Limited
- Drielad Limited
- Dunlop Limited
- Fairey Allday Marine Limited
- Fairy Engineering Limited
- Ferranti plc
- Flight Refuelling Limited
- GKN Sankey Limited
- Gloster Saro Limited
- GQ Defence Equipment Limited
- Graseby Dynamics Limited
- Gresham Lion plc
- Hale, Hamilton Valves Limited
- Hawker Siddley Dynamics Engineering Limited
- Helio Mirror Company Limited
- Helmets Limited
- Heywood Williams Limited
- Hotspur Armoured Products Limited
- Houchin Limited
- Hunting Engineering Limited
- Hy-Mac Limited
- IMS Limited
- Inverton Simulated Systems Limited
- Jeltek Limited
- Kelvin Hughes (Smith Industries Limited)
- T. W. Kempton Limited
- Laird (Anglesey) Limited
- Lansing Limited
- Lucas Defence Systems Limited
- Marconi Avionics Limited
- Marconi Communications Systems Limited
- Marconi Radar Systems Limited
- Marconi Space & Defence Systems Limited
- Marlow Ropes Limited
- Martin Baker
- MEL
- ML Aviation Company Limited
- Morfax Limited
- Muirhead Vactric Components Limited
- Muir-Hill Limited
- Normalair-Garrett Limited
- Pains-Wessex Limited—Schermuly
- Pantak Limited (Thorn EMI Electronics Limited)
- Paxman Diesels Limited
- Perkins Engines Limited
- PI Castings (Altrincham) Limited
- Pilatus Britten-Norman Limited
- Pilkington PE Limited
- Plessey
- Portsmouth Aviation Limited
- Pye Telecommunications Limited
- Racal-Decca Navigator Limited
- Rank Pullin Controls Limited
- Rank Taylor Hobson
- Rediffusion Radio Systems Limited
- Rediffusion Simulation Limited
- Remploy Limited
- Reynolds Boughton Limited
- RFD Inflatables Limited
- Richard Electronics (Markyate) Limited
- Rolls-Royce Limited
- Rolls-Royce Motors Limited
- Rotork Marine Limited
- Royal Ordnance Factories
- Rubery Owen (Warrington) Limited
- The Sas Group of Companies
- Saunders-Roe Developments Limited
- Scanray (International Testing) Limited
- Shorrock Security Systems Limited
- Short Brothers Limited
- The Singer Company (UK) Limited
- Smiths Industries
- The Solartron Electronics Group Limited
- Standard Telephones & Cables plc
- Stella-Meta Filters Portals Water Treatment Limited
- Sterling Armament Company Limited
- Stone Vickers Limited
- Thos. Storey (Engineers) Limited
- Storne Limited
- Thorn EMI Electronics Limited
- Toye, Kenning & Spencer Limited
- Triplex Safety Glass Company Limited
- Ultra Electronics Limited (Dowty)
- United Scientific Instruments Limited
- Vauxhall Motors Limited
- Vickers plc
- W. Vinten Limited
- Vosper Thornycroft (UK) Limited
- Wadham Stringer (Dell Quay) Limited
- Wallop Industries Limited
- Ward Engineering Services Limited
- Westland plc
- Weston Simfire
- YARD Limited