The spirit that built the British Empire.

From here:

Around 100 people braved the cold weather to ride the capital’s underground system in their pants today as part of the annual No Trousers Tube Ride……

Participants were also told to tell fellow commuters that they had forgotten their trousers and to insist that it was merely a coincidence that others had done the same.

They were also instructed to sit in the car as they normally would, and to do ‘normal’ things such as read a magazine or newspaper.

The two requirements for taking part in the event are a willingness to take your trousers off on the Tube and the ability to keep a straight face about it.