Times (UK): Sheffield A student of industrial design has made a working £15 bicycle out of industrial-strength cardboard. Phil Bridge, 21, of Sheffield Hallam University, said the bike was strong enough for a rider weighing up to 12 stones and would not go soft in the rain, although it has a life expectancy of only about six months. The bike is made almost entirely from recyclable and recycled materials, using mechanical parts that can be reused. Mr Bridge said: ‘The lightweight quality of the …