Alley cats. Footloose and fancy-free. Streetwise moggies playing to the rules of evolution. Competing in the game of the survival of the fittest. Enter the Council Cat Catcher - playing to different rules. London's wild cats face new control measures: life doing porridge; a neutralising snip of the castrator's scissors; death in the gas chamber. Fair do's? Well take a walk on the wild side with Q.E.D. before making your mind up.