banksy strikes again...

A self-styled art terrorist has caused embarrassment at the British Museum in London by installing his own 'primative' painting of a caveman pushing a supermarket trolley.

The artwork appeared in the Roman Britain gallery.

Trolleys were first used in the Piggly-Wiggly Supermarket chain, Oklahoma City, in 1937.

The bizarre exhibit, labelled Early Man Goes to Market, was a hoax put there by Banksy, the most famous art terrorist in the country.