Posters urging Londoners to become "suicide bombers" have been appearing at bus stops across the capital.

On first glance the posters appear to be unusually-worded recruitment advertisements for the Royal Navy; they feature the naval force's branding, and the text directs people to the website royalnavy.org.uk for information about joining the crew of a nuclear submarine.

“The crew of our nuclear submarines are on a suicide mission," the posters claims. "To launch their missiles means death is certain, not just for them, but for the millions of innocent people those bombs will obliterate, and for the rest of us too.”

The spoof posters, installed by a 'subverting organisation' known as Special Patrol Group, were designed by British artist Darren Cullen, whose work has previously featured at Banksy’s Dismaland exhibition and at the Victoria and Albert Museum.