“The Darkest Dawn” (*1/2 out four) should have been retitled “The Darkest Yawn”; umpteenth story of a zombie invasion, this one set in Britain, as two sisters (Bethan Mary Leadley, Cherry Wallis) realize it’s apocalypse now and try to stick together and survive as all of Britain descends into chaos. Tired zombie invasion movie only for those who have never seen “28 Days Later” or any episode of “The Walking Dead.” Good cast is left high and dry and can’t breathe any life into this worn material.