- Circuit Boards
- Distributors
- West London Electric
 - Ealing - Wholesale distributors of commercial audio equipment, public address sound systems, audio/visual equipment, and more.
- Electric Motors
- Lynch Motor Co Ltd
- Manufacturer of permanent magnet DC electric motors for a variety of transport applications.
- Lasers > Holography
- Spatial Imaging Limited
- Richmond-upon-Thames - Manufactures holograms for security, packaging, and display purposes.
- Power Supplies
- Roshe Power Ltd.
- Enfield - Designs and manufactures transformers and associated equipment.
- Shopping and Services@
- Test and Measurement Equipment
- Tinsley Precision Instruments
- Croydon - Supplies precision electrical standards testing equipment for transformer, coil, and submarine cable tests.
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