"People talk about reluctant remainers, but I think there have been a lot of reluctant Brexiters around, people who voted leave thinking it wouldn't happen but they'd be able to vent and to tell all their friends at dinner parties they'd done it," said one Tory minister.

"He thought what all those reluctant Brexiters thought: it would be a vote for remain, he would be seen as having stood up for a principle." After which leave's newest martyr could simply have bided his time for a year or so before being triumphantly installed in Downing Street.