- Amiga Amateur Radio User Group
- AMSAT-UK
- British Amateur Radio Lighthouse Society
- British Amateur Radio Teledata Group – BARTG
- British Amateur Television Club – BATC
- British DX Club
- British Railways Amateur Radio Society
- British Young Ladies Amateur Radio Association
- Cave Radio & Electronics Group
- CDXC
- Chiltern DX Club
- Eddystone User Group
- Fists UK – Morse Society
- G-QRP Club
- International Beacon Project (IARU)
- International Short Wave League – ISWL
- Narrow Band Television Association
- Radio Amateurs Old Timers Association – G2OT
- Radio Officers Association
- Radio Society of Great Britain
- RAIBC – Radio Amateur Invalid and Blind Club
- RAOTA
- RAYNET
- Remote Imaging Group
- Royal Air Force Amateur Radio Society – G8FC & G8RAF
- Royal Naval Amateur Radio Society
- Royal Signals Amateur Radio Society
- Scouts Jamboree on the Air
- Summits on the air
- Thinking Day On The Air – TDOTA: Guides & Brownies
- UK Microwave Group
- UK Six Metre Group
- Vintage and Military Amateur Radio Society – M0VMW
- Worked all Britain