OO Gauge
- Accurascale
- Bachmann
- Dapol Kits
- Dapol OO
- DCC Concepts OO Track
- EFE Rail
- Gaugemaster OO Buildings
- Gaugemaster OO Locos & Wagons
- Golden Valley Hobbies
- Heljan OO
- Hornby
- Hornby 2022
- Metcalfe Kits
- Modelscene
- Noch HO Figures
- Oxford Rail
- P&D Marsh
- Parkside OO
- Rapido UK
- Ratio OO
- Springside OO Lamps
- Superquick
- Thomas & Friends
- Tracksetta
- Wills
