Shortly after UK Prime Minister Theresa May’s decision to call an unexpected “Brexit election”, I wrote that pro-Europeans in Britain might yet snatch victory from the jaws of defeat. But the timescale I had in mind was five years, not five weeks.

How long May will survive as prime minister is impossible to predict. Her fate will depend on personal vendettas and Byzantine political rivalries, not only in London, but also in Edinburgh and Belfast. But in trying to anticipate the outcome of the Brexit negotiations, the questions that matter no longer have much to do with May’s political survival.