Overview: Introduced by William Woollard from the South of France, where he road-tests the latest Jaguar XJS, at last offered in fully convertible form. Jaguar’s 20-year-old V12 engine is challenged by another from BMW. Chris Goffey compares the two power plants and the cars they propel. Car road tests can help you make an informed choice, but what about buying tyres? Which provide the best grip, life and handling? Also Sue Baker visits an adventure school in Scotland to learn how to drive ‘cross country’ and Frank Page test-drives current kit cars.