The pram in the hall was one spy’s best friend

‘If you had visited the quaint English village of Great Rollright in 1945, you might have spotted a thin, dark-haired and unusually elegant woman… climbing on to her bicycle,’ Ben Macintyre opens his latest book, like the start of a gentle Ealing comedy. It will come as no surprise to his fans that the elegant Mrs Burton, Cotswolds housewife, baker of excellent cakes, mother of three and wife of a chap called Len who works in the local aluminium factory, is in fact Colonel Ursula Kuczynski of the Red Army, aka Agent Sonya, whose clandestine mission is to help the...