Overview: Jeremy Clarkson goes to one of the world’s highest motor shows, in the Alps, to test Land Rover’s latest V8 Defender, and asks why it’s not on sale in Britain. Chris Goffey visits a project in Oxford designed to prevent teenagers drifting into car crime. Tiff Needell takes road and race versions of the Jaguar XJ220 and Lotus Sport 300 to Silverstone to assess their performance.