Smokers could no longer light up on London Tube trains after a new year-long trial smoking ban came into force.

Smoking had previously been allowed on the Underground, with both smoking and non-smoking carriages provided.

But a report into a 1981 fire at Goodge Street Tube station where one person died recommended that smoking was banned.

The ban was made permanent and extended in February 1985 to cover stations below ground after a fire at Oxford Circus, again blamed on a discarded cigarette.

However most people ignored it and lit up on the way out of the station, and it’s thought a smoker who dropped a match caused a huge fire at King's Cross station in November 1987 which killed 31 people.

Soon after the fire, smoking was banned across the entire network.