Rammi who took part in the event last year is organising this year's on the London Underground. Once again it looks likely to be a freezing cold weekend. However, on Sunday afternoon on the 9th January there'll be people casually travelling around the London Underground sans trousers.
Last year over thirty people took part in London and there's currently over 170 signed up on the Facebook event page. There's still time to sign up, all you need is "Willingness to take trousers off on the Tube and the abilty to keep a straight face about it".
The aim is to be nonchalant and like the US riders to look as though you've just forgotten to wear trousers. Rammi says: "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 piss them off."
Good luck to them, and I look forward to seeing any pictures or videos on Monday!