Graffiti artist Banksy's biggest exhibition has been unveiled by Bristol City Museum, featuring more than 100 of works which were installed in the council-run museum amid great secrecy this week. The show - which was kept secret from council bosses - includes new works including a burned-out ice cream van. Banksy was previously sought for vandalism by the police and council in his home city. He said: 'This is the first show I've ever done where taxpayers' money is being used to hang my pictures up rather than scrape them off.'