In every gathering, someone — often me — calls for a show of hands on Brexit. And I have to report that, in the varied circles in which I move, ‘leave’ may have the best tunes but isn’t winning the argument. At a Mayfair fundraiser for a Jewish charity, the crowd of mostly thirty-to-fortysomething men in suits (and many in yarmulkes) was 90 per cent for ‘remain’; a former Tory minister was spotted waving both arms in a desperate bid to boost the ‘leave’ minority.