Wolf Alice are in a class of their own when it comes to the Mercury Prize. Last month, they received their fourth consecutive nomination for the coveted music award thanks to their new album, The Clearing. That's something no-one else has ever achieved. Not Arctic Monkeys, not Radiohead, not Pulp. What's more, they've done it with their first four albums. "For some reason, it makes me feel really anxious," admits singer Ellie Rowsell, speaking to the BBC from Nashville, where the band are in