So, in case you weren’t watching, it’s out of the bag. UKIP’s primary concern is immigration. The very first point that Farage, in his valedictory speech, urges the next Prime Minister to adhere to is: “We need a new Prime Minister that puts down some pretty clear red lines, that we’re not going to give in on issues like free movement”. On the Conservative side of the fence we hear Philip Hammond saying that it is absurd to promise, before...