I'll repeat the mention of WORM (Weston-super-Mare) and Yatton, and add Caldicot RC Racers to that list, as it's only an hour from Cirencester.
All have sections on here if you poke around.
WORM run roughly fortnightly on the outdoor astro track, and when the weather is bad Yatton take up the meeting at their indoor venue for us as they are just up the road!
Caldicot run every Friday night all year round indoors and run 10th and micro offroad. It's just the other side of the Severn Bridge, but don't let the bridge toll put you off...the racing only costs £2 per night for members, £3 for non members, so no worse than going to most other clubs in total! There are a good few who come from other side of the bridge (me included!) and it's always a good nights racing
