Simon Stephens gives his plays misleading titles. Nuclear War, Pornography and Punk Rock contained little trace of their advertised ingredients. Heisenberg: The Uncertainty Principle includes no information about the German physicist or his theories. This is a sentimental romcom starring Anne-Marie Duff as a giggling airhead who stalks a grunting Cockney shopkeeper played by Kenneth Cranham. He’s 75 years old and though she’s in her mid-forties she has the skittish desperation of a gold-digging pensioner trying to act the nubile bimbo. Both characters are bored loners adrift in London. And because they’re solidly working class (she’s a receptionist, he’s a butcher), they excite our curiosity as lesser beings far removed from our own social milieu. This is important for the writer and the audience. Had the play been about a female QC seducing a linguistics professor, the affair would have seemed unconvincing, and the emotional mood would have been far harder to capture through dialogue.
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