Hugo Swire was not supposed to be remembered. A nondescript, workaday member of the British Parliament, Swire followed the well-trodden Establishment blueprint of any number of mid-level government drones before him. St. Aubyn’s. Eton. Sandhurst. Two decades hovering on the peripheries of power, and then a long and unmemorable retirement on a Commonwealth investment council. His destiny was ultimately to come and go without making a splash.

But then his wife wrote a book, and now everything has flown out of the window. Throughout her husband’s career, Sasha Swire kept a series of clatteringly indiscreet diaries. And now they’re being published as a clatteringly indiscreet book, Diary of an MP’s Wife, that has already managed to spook the life out of Westminster.