With the mercury plummeting and the capital braced for snow, it takes a brave soul to sling the strides and go trouserless on the tube.
But that's precisely what over 100 people did yesterday for the London-leg of No Pants on the Subway 2013. The stunt was conceived in 2002 by 'prank-collective' Improv Everywhere, which aims to cause 'scenes of chaos and joy in public places'. They're an American group, and hence they're suggesting you go without your trouser-pants, not your underpants. And by 'Subway', they mean 'Tube'...but you get the idea.
Fellow passengers offered a mixture of disapproving looks and broad grins, but we wouldn't go as far to say that there was chaos. You can judge that for yourselves from these photos, however...