From safety warning to punchline: the Tube sign vandals loved

"The old sign was, ahem, amenable to being reversed in intent if you scratch out the right bits. Vandals often turned it from: Obstructing the door causes delay and can be dangerous...to Obstruct█ █ █ the door cause█ delay and █ █ █ be dangerous."

"The message was changed when the current fleet of Northern line trains was introduced, and phased out across the rest of the fleet over time."

"There's one place you can still see the old message - as it's still in use on the converted D-Stock trains being used by GWR as a battery train trial on the Greenford branch line most Saturdays."

Tube train warning signs have evolved over the years to prevent vandalism. The original sign read, 'Obstructing the door causes delay and can be dangerous,' but was often altered by vandals. The current sign states, 'Obstructing the doors can be dangerous.' This change occurred with the introduction of the new Northern line trains and was gradually implemented across the fleet. However, the old message can still be found on converted D-Stock trains used by GWR on the Greenford branch line during battery train trials.

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