These incredible CCTV pictures show a Tube maintenance train which was being towed on the Northern Line in August 2010. It then broke free and rolled back down the line at speeds of up to 30mph. It eventually came to a halt on an incline near Warren Street after passing through seven stations.
The driver jumped free of the out of control vehicle as it hurtled through Archway station. A court heard how it came with 600 metres of a passenger train.