Lots of talk of having a dedicated UK forum.
Here is one I set up for MZs. Ackshullya mate did it for me, I just moderate it occasionally. I am happy to do again. I will donate a domain, I need some (trustworthy) volunteers to moderate. By and large, a forum site can be left to it's own devices, just delete any offensive posts and generally police it. It was made from a standard skin available free.
Not many visitors but then again it is a limited topic. Easy enought to do the same for a GTR Conc
http://www.mzisback.co.uk/bbs/