James Hetfield (left) and Kirk Hammett of Metallica performing during the Live Earth Concert at Wembley Stadium. The veteran US rockers have been announced as the Saturday night headliners for this year’s Glastonbury festival. Photograph: Yui Mok/PA Wire

Metallica have become the first heavy metal band to headline Glastonbury. The announcement was made this morning by Glastonbury founder Michael Eavis (...)