Hundreds of London Underground commuters have stripped off their trousers to take a half-naked trip for the annual No Trousers On The Tube ride.
Crowds met outside the National Gallery in Trafalgar Square for the 10th annual event before heading underground where they boarded trains on different Tube lines across the capital.
More than 100 people piled on to the Piccadilly Line, where they struggled to remove their trousers due to the large crowds.
Hundreds of London Underground commuters took part in the 10th annual No Trousers On The Tube ride this afternoon
Regular Sunday passengers were left bewildered as men and women sat in their brightly-coloured underwear talking, reading and taking pictures of each other
Brave passengers ride a Jubilee Line train as they take part in the event on Sunday afternoon
Another group posed at Canada Wharf as they took part in the No Trousers On The Tube event
Regular Sunday passengers were left bewildered as men and women sat in their brightly-coloured underwear talking, reading and taking pictures of each other.
After changing to the Jubilee Line at Green Park, the group got off at Canary Wharf to do some aerobics on the platform before jumping on another train.
Other groups set off for London landmarks, including one which headed to Parliament.
Sisters Tessa and Matilda Deterding said they had come for the first time because they liked the idea behind it.
Some brave revellers even stopped to pose half-naked as they travelled around the city
Crowds piled onto various Tube lines across the capital in brightly-coloured underwear
The event is part of the worldwide No Pants Subway Ride, which began in New York in 2002 and has since spread to over 60 cities around the globe
A couple in the No Trousers Tube Ride parade near fellow participants by the entrance to an underground station
Tessa, 24, from London, said: ‘We read about it and thought it sounded hilarious. I wasn’t nervous about it.
‘I quite like the sentiment behind it, instead of a stiff upper lip it’s having a bit of a laugh.’
Matilda, 22, said: ‘I did especially pick out my pants, you have got to pick out a nice opaque one. You don’t want to give too much of a spectacle.’
Trouserless revellers then headed to The Chandos pub in Trafalger Square for an after party.
The London event was organised by the Stiff Upper Lip Society, which asked participants to ‘avoid thongs/budgie-smugglers/anything see-through’
A group of three women (left) sit on a circle line train in their underwear as a young mother (right) waits on a platform with her son
One of the organisers, Farhan Rasheed, said there was not really an aim to the event, it was just a bit of fun
The annual event is part of the worldwide No Pants Subway Ride, which began in New York in 2002. It has since spread to more than 60 cities across the globe, including Berlin, Lisbon and Toronto.
The London event was organised by the Stiff Upper Lip Society, which asked participants to ‘avoid thongs/budgie-smugglers/anything see-through as we aim to amuse, not offend, fellow Underground users’.
One of the organisers, Farhan Rasheed, said there was not really an aim to the event, it was just a bit of fun.
People walk to a Jubilee Line train as they take part in the annual No Trousers On The Tube Day
Revellers show off brightly-coloured and patterned underwear as they brave the tube on a cold winter’s day
He added: ‘There is no point to it, we are not campaigning or raising awareness of anything.
‘People just have fun doing it, it’s a bit of a nonsense day out.
‘You very rarely get people who are offended. It’s London and London is used to this stuff, they take it in their stride and get back to their book.’
A group of fearless friends laughed together as they exited a tube station during the event
A Jubilee line carriage filled with trouserless passengers reading and taking photographs