Fifteen years after penning his mega-hit Jerusalem, Jez Butterworth has knocked out a new drama. The slightly baffling title, The Hills of California, refers to a hit by Johnny Mercer (the US songwriter not the MP for Plymouth) and it suggests American themes and locations. But the show is set in a knackered old Blackpool boarding house in the 1970s, where three sisters are waiting for their elderly mum to croak.