The unmade bed by Tracey Emin caused a stir at the Turner Prize a few years ago, but now the Tate Britain gallery has an even stranger bed on display - made entirely of white bread. The work, simply called Bed, was made from 8,000 slices from which the sculptor, Antony Gormley, carefully ate away his own imprint. The result is the size of a normal double bed, with two hollow human shapes. Today Mr Gormley, who won fame for the monumental Angel of the North sculpture on a hill near Gateshead, described how he had to eat his own...