Overview:Vicki Butler-Henderson chauffeurs comedian Bill Bailey to one of his West End gigs in a Mercedes that has been converted to run on nothing but chip fat. Tom Ford test-drives the new Kia Soul, while Jonny Smith presents his pick of reasonably priced cabriolets. Tiff Needell takes the new Lamborghini Gallardo LP560-4 for a spin and Tim Shaw investigates the savings to be made on new vehicles.