Andrius
Every meeting has an Off Road entry and a Touring car entry. As far as i know they run to BRCA rules for Circuit and they definitely run to BRCA rules for Off Road. See:
http://www.brca.org/
I run a small club nr Honiton in Devon we run 1/10 Off Road and Tamiya M Chassis indoors if your interested.
www.trcmcc.co.uk