Appreciate all your help guys, seems like lots of knowledgable forum members out there!
took it on a longer (and fairly vigorous) run today and seems to have improved, power is def up and stronger boost at low revs, still intend to get it checked out tho.
btw anyone know of any scooby/performance specialists in the south? I live in Eastbourne on the south coast and would prefer to have the car worked on by experts rather than the local garages who don't deal with these issues day to day. Seems most of your are much further North!
thanks again
Mark