Barristers and former lovers Eric Bana and Rebecca Hall fall foul of shadowy government agents in this uneven but gripping conspiracy thriller.

Bana and Hall are called upon to defend a Turkish immigrant accused of masterminding a terror attack on London’s Borough Market. The ensuing plot, cooked up by screenwriter Steven Knight, sometimes gets bogged down in legal intricacies – with much effort expended on explaining why the defendant has to be tried in a closed hearing away from prying public eyes.

However, when the intrigue gets going, it has a clammy suspense and there are striking supporting turns from the likes of Riz Ahmed as a slick MI5 agent and Jim Broadbent as the Attorney General, who veers scarily from slippery bonhomie to silky menace.