Scores of half-naked Londoners are set to ride the Tube en masse as part of this year's No Trousers on the Tube Day.
No Trousers Tube Ride 2018: Scores of Londoners pledge to strip and ride Underground half-naked for worldwide event
More than 100 people have already pledged to brave the cold temperatures and join the event, which will take place on Sunday afternoon.
It is part of the worldwide No Pants Subway Ride which began as a small prank in New York in 2002 and has since spread to over 60 cities around the globe including Tokyo, Jerusalem and Mosceow - writes standard.co.uk.
Last year 300 Londoners took part in the gimmick , which always takes place in early January and urges travellers to try and keep a straight face during the stunt.
Bizarre sight: People take part in the annual 'No Trousers On The Tube Day' in 2017. ( AFP /Getty Images)
This year marks London’s ninth No Trousers Tube Ride stunt and organisers The Stiff Upper Lip Society are encouraging people to join the group in Westminster before an hour and a half of riding trains and then an after-party.
Chilly: Passengers grinned as they took the Tube wearing no trousers in 2017. ( AFP /Getty Images)
“At 3pm, participants will be organised into groups, and will walk to a nearby station,” the event information read.
“When told to by your group leader, remove your trousers, and put them into your backpack.
“For the remainder of the journey, sit in the car as you normally would. Read a magazine or whatever you would normally do.”
The organisers added: “You can wear fun underwear if you like, but nothing that screams out, 'I wore this because I’m doing a silly stunt.'
“Wear two pairs of underwear if it makes you feel more comfortable.
"Don’t wear a thong or anything else that might offend people.
“Our aim is to make people laugh, not p*** them off.”
They added the event is “always a blast” and assured people they would not be chilly as the entire trouser-less part of the event is underground.
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