Just found this list on the Central RS Owners club website (traders attending Central Day)...

A1 Rally Sport
Auto Specialists
AW Automotive
Banshee Motorsport
Blue Oval Sports Sales
Brom Zoo Motorsport
DMB Graphics
Escort Evolution
Event Photos
Fast Ford Magazine
Image Race and Leisure
JC Motorsport
Matt Lewis Motorsport
Meguiars UK Ltd
MTS
Nomad Racing
Odd Kid Creations
Performance Ford Magazine
RallyeSport
Rapid Ford Ltd
Retro Ford Magazine
Reyland
Roose Motorsport
Tudor Davies
Wrights Auto Supplies