After Hollywood turkeys like Swarm and the toothless Jaws 4, it is a pleasure to see Michael Caine acting brilliantly in this low-budget, high impact thriller. He plays a pensioner in a south London estate terrorised by thugs who turns vigilante to avenge the murder of a friend. First-time feature director Daniel Barber drives his all-too-credible story with momentum, the young screen thugs are truly scary but it is Caine’s triumph.