Twice in the history of the UK's Railways has an accident led to the loss of more than 100 lives. The second took place on Wednesday the 8th of October 1952.
Three trains collide with each other at Harrow & Wealdstone station just outside London. 112 people are killed and 340 injured.
How could this have taken place? Join us to find out what happened and how it could have been prevented.
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