Subheavy is the only regular dubstep night in Kernow on a proper rig...you have to get down to Falmouth for your dubstep in Kernow!
you missed a locals night two weeks back, was a great night. the rig was sounding fearsome! they do it out really nice in the rugby club for the subheavy nights, the rig sounds amazing in that room and the drinks are cheap! pints of tribute for £2.30 or something
Devonside, there's Subheavy Plymouth @ maggie's regularly too. same soundsystem.
also The Deep End does dubstep in Exeter and Bideford on proper rigs.
Siqnote who plays with the freerange crew in Cornwall plays dubstep too. they do nights at the sandsifter in gwithian, I think Siqnote does the music for room 2. dubstep all night.
the next dubstep night in the south west is the deep end's, Mundo is coming down next weekend.
next one in cornwall is subheavy in falmouth. there's definately one in october (will be big!), but i think there might be one in september too!