Mahalia Belo’s confident feature debut brings Megan Hunter’s acclaimed 2017 dystopian novel to the screen as a disaster movie, whose immense power derives from the intimacy of its performances.

An excellent Jodie Comer, playing a young mother who with her new born child is trying to return home after London is submerged under water, is joined by a uniformly superb cast, including Joel Fry and Katherine Waterson, who convey the emotional gravity of this poignant and unsettlingly prophetic tale of survival against the odds, which has echoes of The Road and Children of Men.

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