For those that kindly replied to my previous post on this subject;-
Went back to basics, the wheel and tyre were checked for ballance at a competant service point, and was in fact found to be out of ballance, but more importantly showing visible levels of run-out!
Wheel now has huge weights added to compensate, and reduce vibration, whilst I await a response from AVOn about why a 12 month old CR6 tyre costing over 300pds should have such a problem.