You may wonder why I am up at 4.45 a.m. writing this diary when I have a country to run, Queen’s speech to prepare, vast mandate to deliver, and so on. The answer is simple. It is a question of obligation. When I bumped into the editor (at Sajid Javid’s 50th birthday party) a couple of nights ago, he explained — with a slightly glassy expression — that he had taken a gamble.