- EMC Partner UK Ltd
- WEMEC
- Cherry Clough
- AQL EMC
- Element Materials Technology
- Poly, now a part of HP
- RIcardo Rail
- Laplace Instruments Ltd
- Thales
- R.N. Electronics a part of kiwa
- Eaton
- METECC
- MS Testing
- MVG – Microwave Vision Group
- Leonardo
- Applus+ 3C Test
- MDL Technologies
- A HORIBA Company – MIRA
- ETS-Lindgren
- Rolls Royce
- Eurofins York
- Trescal
- Montena Technology
- AR United Kingdom
- Eurofins ETC
- Renishaw
- Product Approvals Ltd
- Eurofins Hursley
- Test Equity
- Wurth Electronics UK
- Global EMC UK Limited
- Intertek
- ITC Services
- Raymarine
- Conformance Ltd
- Babcock International Group
- Rohde & Schwarz
- Wave Scientific
- CASS Industries Ltd
- Arrival
- UKAS
- AWE
- Sky UK Limited
- SGS
- ZF Automotive UK Limited
- BAE Systems
- Malvern Optical
- SAAB
- TÜV SÜD – EMC Testing
- CCQS UK Ltd
- Dyson
- Cre8 Associates
- Unit 3 Compliance
- dB Technology
- Qinetiq
- Kiwa Electrical Compliance
- ETS
- National Physical Laboratory
- Fronius Internațional GmbH
- Total Information Assurance
- Schaffner
- HMGCC
- Peak Electromagnetics LTD
- UL
- Technology International
- Cranage EMC & Safety
- Electric Triangle Company Ltd
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