If you want to find out about rallying in the UK, then go into any W H Smith and buy a copy of Motoring News.. It's a weekly newspaper covering all motorsports events in the UK..
Oh and keep checking bbs.scoobynet.co.uk and bbs.22b.com usually info on both of those sites.
And you could always post on one of those sites offering to act as service crew.
Also try http://www.rallysport.com/