Another claimed it was about Brexit, with the cat painted on a billboard because billboards carried the ‘£350million for the NHS promise during the campaign’. Writing under Banksy’s Instagr ...

Girl With Balloon, 2004. Courtesy of Pest Control Office, Banksy, London. One of Banksy's well-known pieces is called Sweep it Under the Carpet and was made in 2006 on a wall in London.

Last night's sale at Sotheby's, which totalled £62.5m, also included a £4.3m Banksy sold by blink-182 frontman Mark Hoppus ...