Roger,
All COBRA details can be found here
http://www.swmcrc.co.uk/, you'll need to register to post on the forum section.
The next meet is on the 27th, it's indoors at Llanishen High School, Cardiff. There is electricity there but you'll need a table and chair and a big, thick warm coat as the hall isn't heated (we've got an industrial gas powered space heater but it takes a while for it to kick in). The food from Ness' Kitchen is fantastic though, which makes up for the cold.
The only rule that'll probably affect you is that mini-pins (of any make) tyres are not allowed.
Ian