Hmmm i don't think you could be further away from R/C clubs if you tried...
There was a thread recently on possible North Wales tracks -
http://www.oople.com/forums/showthread.php?t=99230
Don't know what 1/8 or circuit tracks could be up there as they don't interest me !
Owestry is probably nearest to you, then Ludlow, Hereford/leominster and the two Telford clubs are probably your best bet for 1/10 offroad, but wherever you go i would say your in for a long drive...