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For all its desperate attempts at tension, suspense and edge, this Brit-thriller is dismally dull.

Two men – club-owning businessman Ian (Kenny Doughty), and assassin Issac (Ingvar Eggert Sigurðsson) – are separately ordered to kill each other.

Able to track their opponent's location via GPS, they have 12 hours to do so or loved ones start to suffer.

Stephen is a freelance culture journalist specialising in TV and film. He writes regularly for the Guardian, the Daily Telegraph, the i, Radio Times, and WIRED.