Andrea Arnold made her name with distinctively photographed films about social outsiders, often young women, from the provocative revenge drama Red Road (2006) to a sensuous adaptation of Wuthering Heights (2011). American Honey, her first film to be made outside the UK, has most in common with her portrait of a frustrated teenager on an Essex estate, Fish Tank (2009), though the divide between rich and poor gapes in all her films. With this class-conscious road movie, Arnold takes a risk by…