THE LONDON underground was a sight to behold this past Sunday thanks to the return of the annual No Trousers Tube Ride.
Now in its 11th year, the phenomenon started out with just a handful of trouser-less enthusiasts riding the New York subway system.
Dubbed the No Pants Subway Ride the craze has since gone global with participants from over 60 different cities around the world stripping off for the annual shindig.
In cities from Tokyo to Moscow, people have been getting involved in the scantily-clad fun but the movement has proven particularly popular in London.
As many as 500 brave souls descended on tube stations across the English capital this past Sunday, January 12.
Crowds of half-dressed folk descended on Trafalgar Square before setting off for the underground where they boarded trains on different Tube lines across the city.
It was an impressive effort, especially considering the bitterly cold temperatures.
There were only two strict rules.
Firstly, participants were required to take their trousers off and keep them off at all times. while on the Underground.
Secondly, they were expected to maintain a straight face at all times.
Revealing undergarments such as budgie smugglers and thongs were also prohibited with organisers eager to amuse rather than offend their fellow travellers.
Thankfully the whole thing went off without a hitch.
And with an estimated 900,000 Irish people living in London, there is a good chance the Emerald Isle was well represented on the day.