The idea is cracking on paper: a warring theatre couple hired to play the perfect married pair on live TV, all fake cosiness on screen and flying crockery off it. Early on, Peter Finch and Kay Kendall bounce off each other with enough snap to suggest you’re in for something special.
Then the film splits them up, pads things with a beige extra couple and a half-hearted romantic muddle, and spends most of its time there instead. The chemistry you actually came for is rationed out in crumbs.
The TV satire has its moments – a chaotic Christmas broadcast, a few neat gags about live shows teetering on disaster – and there’s a faintly sharp sense of how television turns private mess into public wallpaper.
But it’s all so polite the claws never really come out. As curiosities go, Simon and Laura is mildly interesting, but unless you’re on a mission to hoover up 50s British media oddities, you’re not missing a hidden gem.