If you were a little unsure as to why you saw a collection of people wearing no trousers on the tube yesterday it was all part of the 12th annual No Pants Day on the Tube.

Why the creators decided to call it no pants day rather than no trousers day is beyond us as no pants lead to all sorts of different outcomes as opposed to trousers. Possibly the creators, Improv Everywhere wanted it to be USA encompassing as it takes place in many cities across the world.

But we bet all those that took part were happy that the day was yesterday rather than today! Snow is not the best accompaniment to naked ankles.

To be part of the day you had to get on the tube in normal clothes just minus your trousers and travel with a straight face.

Image: Evening Standard