I could recommend Tayside Aviation at Glenrothes or Dundee (Perth too? Can't remember) on the basis that I did some extra training with them after returning with my new PPL from one of the pilot factories in Florida. I recall being struck by the professionalism of the instructors, and particularly the excellent condition of the planes (like... clean coloured oil when you inspect it... what's this?) Nice facilities too and run by nice people. Unlike the Florida place, which was run by the biggest w*nker I have met in my whole life.