Isobel Campbell and Mark Lanegan: Barbican, London EC1

IN THE FIVE YEARS since she started working with Mark Lanegan, Isobel Campbell has emitted a low hum of irritation that we should find their alliance surprising. No matter that she used to play cello with those fey Scottish indie flowers, Belle & Sebastian, and Lanegan's history — beyond having fronted the Seattle grungesmiths, Screaming Trees — includes stints as a trailer park bailiff and a prison sentence for possession of crack cocaine.