Artists who exhibited their work at Banksy’s Dismaland theme park have taken their political messaging to London’s transport lines. Special Patrol Group – who have previous for placing their guerilla anti-police art across the city – are spreading awareness about the DSEI Arms Fair, an event being held at the ExCel Centre in Newham, London, where weapons dealers trade the world’s most horrific weapons. Many of the world’s most authoritarian regimes have been invited to the fair by the UK government, which opens today.

Gavin Grindon, curator of an exhibit at Dismaland, told London24 that as the miserable theme park contains work focusing on the arms trade, taking the message to London seemed only natural. "The posters appeared today to commemorate the opening of DSEI, who don’t seem to have done much advertising of their own," he said.

The Special Patrol Group has hit London with fake adverts that warn and inform the British public about our country’s controversial history of heavily arming countries. Over 300 have appeared on bus stops and on the tube – none of them make for pretty reading:

In order to break into the posters cases, the artists used a specific pack of Allen keys called the "Ad Space Hack Packs", on sale in the Dismaland gift shop for £6. This set can reportedly open a third of ad poster cases around the world.

A spokesperson for TfL told London24: "This is not an authorised advert. It is fly-posting and therefore an act of vandalism which we take extremely seriously. We have instructed our contractor to remove any found on our network.”