Behind every new car lies years of planning and hundreds of thousands of miles of testing. This week William Woollard visits Ford's top secret proving ground at Lommel in Belgium, to experience for himself the testing of the new Granada. But how will it fare in the market place? Sue Baker compares the Granada with some of its rivals, the Renault 25, Volvo 740 and Rover 2300. How thief-proof is your car? Why do cars worth many thousands of pounds have vulnerable locks costing only a few pence? Frank Page gets locked into the world of car security and also test drives the new Rover 216.