There are a few minis around on the south coast (I know of 470 and 522 in Hamble with me, and 229 down in Plymouth), but I'm not sure if any are planning on doing RORC races. Having done many RORC races in the past on larger boats, I'm not sure how much fun it would be on a typical long RORC course when all the other larger boats have disappeared over the horizon?
I plan to do a mix of JOG races doubled-handed under IRC (haven't contacted them yet, but wasn't expecting to have to do an incline test for an non-endorsed IRC cert?), some of the RSYC double-handed series (no IRC cert required - they run a parallel club handicap system) and some of the SORC races. I've been in touch with the last one, and they're happy to let Minis take part, either with a IRC cert or with none but not collecting series points (ie just for see miles & experience)