“A small London gallery has been told by Royal Mail to destroy prints showing postage stamps of the Queen in a gas mask – and tell them of anyone who owns copies. The series, Black Smoke, Stamps of Mass Destruction, was created last year in protest at the Iraq war by James Cauty, a former member of the art-world pranksters and rock musicians known variously as KLF and the K Foundation.” The UK’s postal service is claiming that the works violate its copyright.