Hundreds of Londoners rode the Underground without trousers on Sunday, continuing an annual tradition that began in New York. The "No Trousers Tube Ride" saw participants ditch their trousers and travel on the tube in their underwear,

London's 'No Trousers Tube Ride' sees participants board trains in only their underwear, spreading humor and breaking social norms. Initiated in New York by comedian Charlie Todd in 2002 and adopted by London in 2009,

It's not a new tradition and the only goal is whimsy. Here's everything you need to know about the Official No Trousers Tube Ride event.

One such participant, Basil Long, a lawyer wrapped in a thick winter coat, revealed his bold ensemble: pink underwear, a rainbow-striped shirt, and socks inspired by the Underground. "I just saw it online and thought, why not?" he said with a grin, as reported by AP.

After gathering at the entrance to Chinatown, dozens of clothing anarchists trooped through the icy streets to the Piccadilly Circus Underground station in central London where they boarded their first train. The only hiccup was that the cars were so crowded some people couldn't shed their trousers.

The annual No Trousers Tube Ride event has returned despite freezing conditions across London. Temperatures reached minus 5 degrees overnight across the capital yesterday (January 12) and had barely topped zero by the time participants gathered in Chinatown that afternoon.

Freezing weather in the UK on January 12 didn't stop commuters from taking part in the annual 'No Trousers Tube Ride', which saw people dropping their pants during a ride in the London Underground. Starting in New York in 2002,

Londoners shed their trousers and braved the cold as they travelled in their underwear on the London Underground rail to celebrate the annual 'No Trousers Tube Ride'. People dressed in suits and shirts but wearing nothing on their legs other than underwear and shoes were seen flooding the underground trains,