King's Cross fire

King's Cross fire

A police car, three fire engines and an ambulance outside King's Cross
Date	18 November 1987; 36 years ago (1987-11-18)
Time	19:30
Location	King's Cross underground station, London, England
Type	Structure fire
Cause	Lit match discarded on wooden escalator; rapid spread due to trench effect
Deaths	31
Non-fatal injuries	100
List of UK rail accidents by year

The King's Cross fire occurred in 1987 at King's Cross St Pancras tube station in London, England, causing 31 fatalities. It began under a wooden escalator before spreading into the ticket hall in a flashover.

The fire began at approximately 19:30 on 18 November 1987,^[1] at a major interchange on the London Underground. As well as the mainline railway stations above ground and subsurface platforms for the Metropolitan, Circle, and Hammersmith & City lines, there were platforms deeper underground for the Northern, Piccadilly, and Victoria lines.

A public inquiry was conducted from February to June 1988. Investigators reproduced the fire twice, once to determine whether grease under the escalator was ignitable, and the other to determine whether a computer simulation of the fire—which would have determined the cause of the flashover—was accurate. The inquiry determined that the fire had been started by a lit match being dropped onto the escalator. The fire seemed minor until it suddenly increased in intensity, and shot a violent, prolonged tongue of fire, and billowing smoke, up into the ticket hall. This sudden transition in intensity, and the spout of fire, was due to the previously unknown trench effect, discovered by the computer simulation of the fire, and confirmed in two tests on scale models.

London Underground was strongly criticised for its attitude toward fires; staff were complacent because there had never been a fatal fire on the system, and had been given little or no training to deal with fires or evacuation. The report on the inquiry resulted in resignations of senior management in both London Underground and London Regional Transport and led to the introduction of new fire safety regulations. Wooden escalators were gradually replaced with metal escalators on the Underground.