1952: Many die as three trains crash at Harrow
At least 85 people killed in UK's worst peacetime rail crash after three trains collide at Harrow, Wealdstone.
The accident happened at 0820 GMT at Harrow, a north-west suburb of London.
A London-bound express train from Perth ploughed into the back of the 0731 Tring-Euston commuter train as it was about to leave Harrow and Wealdstone station, on the London Midland region line.
Seconds later, a third train coming from Euston crashed into the wreckage.
Survivors described hearing a deafening sound like an explosion and then broken glass and debris flying everywhere.