Obama portrait artist draws Burnham for Big Issue cover to highlight rough sleeping vow

Exclusive: Shepard Fairey says image will hold PM accountable over promise to get people off the streets

The Hope" portrait of Barack Obama by the US street artist Shepard Fairey came to symbolise a historic 2008 presidential campaign, became one of the most ubiquitous and reproduced political portraits of modern times, and ended up in the Smithsonian.

Fairey's latest work, of the UK prime minister, Andy Burnham, may not elicit the same response but will, he hopes, deliver a hard-hitting message: one of a promise made.