Overview: One-third of the half-a-million cars stolen annually in England and Wales are never recovered. Quentin Willson reports on evidence that suggests that many are being given the identities of legitimately owned vehicles. How well does the latest Lotus Esprit compare with its illustrious predecessors? Tiff Needell tests the new supercar. And Jeremy Clarkson sees how the new Mercedes M-class fares in the four-wheel-drive market.