To the British Museum, to see Grayson Perry's Tomb of the Unknown Craftsman. Where else would you find a 250,000 year old flint axe in the same exhibition as a Metro Centre badge? (The Metro Centre, Gateshead, is Britain's biggest shopping centre). Recent and not-so-recent works by Perry, with all manner of objects made by unknown craftsmen for functional or ritual use, illuminate their skill and perception.