He's not laughing all the way to the Banksy

A number of works by guerrilla artist Banksy have failed to sell at a modern art auction in London.

Fungle Junk - a mural painted on the side of a van - was expected to make £150,000 but was withdrawn after a bid of half that price was made.

A spokesman for auctioneer Lyon and Turnbull said the artist's refusal to authenticate the works was to blame.

Hmm.