BBC News Published image captionThe double-decker's roof was torn off when it struck the bridge The driver of a school bus that had its roof torn off when it crashed into a railway bridge has pleaded guilty to causing injury by dangerous driving. Martin Walker admitted three charges after three children suffered "life-changing" injuries in the crash on 10 September. The double-decker was taking 74 pupils, aged 11 to 16, to Henry Beaufort School in Winchester, Hampshire. Walker, 36, from Southampton, is due to be sentenced on 9 July. Winchester Crown Court judge, Recorder Don Tait, told Walker he could face a custodial sentence. image captionThe bus had been on its way to Henry Beaufort School