Few know the real identity of street artist Banksy, who has turned protecting his identity an artform in itself. The Bristolian's semi-mythical status has seen prices for his works skyrocket, his biggest pieces topping £1m at auction. His rare large-scale shows are staged events in warehouses, rather than staid gallery spaces, but now a former associate has taken it upon himself to put on an unauthorised retrospective in the rather more sedate surroundings of Sotheby's S2 gallery in London.

Steve Lazarides, who worked with Banksy as his first art dealer up until 2008, has brought together 70 authenticated, career-spanning pieces for an exhibition and sale. Some of the art has never been seen in public, having gone straight in to private ownership, and Sotheby's is hoping Banksy's fans will flock to see the free show - alongside the big spenders.

For those with deep pockets, the most expensive pieces for sale in the show come with a price tag of £500,000, which means someone, somewhere is making a hefty profit. Via bbc