What are you going to do? If he’s a friend, you won’t want to betray him. If he’s just a political ally, you might calculate that a) he’s going to win this referendum, b) he’ll be around for a while and c) George Osborne is for In too – and he’ll probably be the next prime minister. In short, there’s everything to lose and very little to gain from backing Brexit. The easiest thing to do is swim with the tide.