Trademark style Bill "Kilo" Pengelly, a legal graffiti artist who works on street-art projects with teenagers, is something of an expert. In the past year there has been an explosion in Banksy ...

A print of Banksy’s Toxic Mary will be auctioned by Duggleby Stephenson of York in York Auction Centre in Murton Lane on Friday.

Banksy's limited-edition print Toxic Mary, once dismissed as unsellable, is expected to fetch thousands at Duggleby ...