From there, Torbay has indoor clubs, and did have an outdoor track, though they were in the process of relocating I believe.
After that you have outdoor tracks at Tiverton to the North, and WORM a little further North again in Weston-super-Mare. A little further North again in Yatton (near Clevedon) there's a permanent indoor club too.
Or going Deeper South and West, there is the West Cornwall RC club, they are right down near Camborne...so about as deep as you can go into Cornwall.
I think there might be 1 or 2 other small clubs around too...but those are the main ones I know about!
All have sections on here, so hope that helps a bit.