51 persons are killed and one hundred and eleven are injured in the wreck of a 12 car passenger train outside London. The injured and dead were removed in five hours of rescue work. An inquiry will examine theories that broken or settled track caused Britain's worst rail disaster in ten years. Nighttime footage shows wreaked train cars. Rescue workers work under floodlights to recover injured. A man craws out from a pile of wreckage. A policeman helps a woman down a sloop. Men carry a stretcher above their heads.