
You cannot talk about Douglas Carswell for long in Westminster without hearing about his “personal vote”, the supposed popularity with which he is uniquely blessed and without which, whichever party he was currently a member of would certainly have lost.
That issue is front and centre now that Carswell has defected, this time quitting Ukip to sit as an independent. That leaves May with the question of whether to let him back into the Conservatives again.