So a couple of weeks back, I tried to get into the "exhibition" set up by Banksy, known as The Cans Festival, set in a disused tunnel behind Waterloo Station. Unfortunately I got there at 9pm on the last day an hour before it closed and it was so packed that hundreds of people were being turned away. I was lucky enough to peer over some railings and catch some of the artists putting their finishing touches to their graffiti.
Banksy invited 40 graffiti artists from around the world to make their mark as well as putting up some installations during the 3 day event. His idea behind it was "...hoping we can transform a dark forgotten filth pit into an oasis of beautiful art". Although Banksy likes to play the rebel, he actually got permission from Eurostar to transform the tunnel into what is now a "public gallery" of sorts.
The art will still be up there for at least 6 months, so catch it while you can (find it just opposite The London Eye).