YOUNG Ben Stirling fancied the motorcycles and hundreds of others inspected the cars yesterday at the Perth Motor Festival. Britain's worst driver was there, Maureen Rees, 56. She was on the TV programme Driving School for needing 500 lessons and 10 attempts to pass her test. She fancied taking the 763mph Thrust SSC, also there, for a spin. ''Not likely,'' said Thrust team leader Richard Noble.