Sharon Ament, the London Museum's director, said the "only thing better than having a Banksy appear on the walls… is having a Banksy on display inside."

The London Museum has secured a new Banksy work for its new exhibition rooms, London police sentry box that was transformed by the mysterious street artist last summer to look like an urban aquarium with piranhas.

Banksy's piranhas artwork will go on permanent public display next year at London Museum, when it opens its new premises in Smithfield. Featuring the fierce fish making an aquarium out of a police sentry box,