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A smoker drops a lit match down through a gap between steps in a wooden escalator at the King's Cross tube (underground railway) station, where it ignites grease and accumulated litter. Noticing the glow of the fire, someone presses the emergency knob to stop the escalator. Although most of the blaze remains hidden, the entire area under the escalator is soon on fire. The growing conflagration causes the escalator above it to heat up. It gets so hot that, aided by the rising draught up the stairway, it combusts and blasts a fireball up the escalator, killing 31 people in the ticket hall 20 metres away. This effect is now called the trench effect. Edit

A smoker drops a lit match down through a gap between steps in a wooden escalator at the King's Cross tube (underground railway) station, where it ignites grease and accumulated litter. Noticing the glow of the... Read More

Add a descriptionA smoker drops a lit match down through a gap between steps in a wooden escalator at the King's Cross tube (underground railway) station, where it ignites grease and accumulated litter. Noticing the glow of the fire, someone presses the emergency knob to stop the escalator. Although most of the blaze remains hidden, the entire area under the escalator is soon on fire. The growing conflagration causes the escalator above it to heat up. It gets so hot that, aided by the rising draught up the stairway, it combusts and blasts a fireball up the escalator, killing 31 people in the ticket hall 20 metres away. This effect is now called the trench effect.Cancel