Tiff Needell plays rough on tonight’s edition of the motoring magazine with the tough guy’s off-roader. The armour-plated Hummer was developed for the US Army, costs £70,000, and, with celebrity owners such as film star Bruce Willis, claims to be the ultimate 4x4. Jeremy Clarkson tests the new Toyota Corolla. Will it convince him that one of the most reliable cars in the world isn’t also one of the dullest?