Britain’s long-running crisis-cum-soap-opera over Brexit may be reaching its denouement today at Chequers, the prime minister’s country house, where the full cabinet is locked in a final debate on whether or not to accept Theresa May’s proposed terms for leaving the European Union. And “locked in” is the appropriate phrase. Ministers have had to surrender their cell phones on arrival; they have been told to expect the meeting to continue until 10.00 p.m.; and a Downing Street flack briefed the media that any minister who resigns will lose his official car straight away and have to walk three-quarters of a...