The mischief-maker behind a series of cheeky anti-Tory posters popping up across London in Peckham, Soho and Kentish Town has been revealed. The Turner prize winner Jeremy Deller is behind the hoardings which declare “Strong and stable my arse”, a reference to Theresa May, the Conservative party leader, who has parroted the strong and stable mantra as part of the UK election campaign. The posters, which were mounted by the FlyingLeaps organisation, are particularly timely as May’s leadership is under scrutiny following her recent U-turn on social care reforms. The street art is a big hit on social media with one tweeter expressing his admiration in no uncertain terms. “Jeremy Deller young man, take a bow,” says the impassioned poster fan.