I stumbled apon this place when I was out on my bike a couple of weeks ago. I don't know if it is new though. - I think it is mainly large scale stuff.
http://www.oorc.co.uk/
Also, I do know of a couple of guys who call themselves "Bromley RC Club" (or something similar). They did have a forum somewhere, but I can't find it now, even after a bit of google searching.