One of the most interesting things about David Cameron is that he’s representative of a group of people at the top of the political class, which also includes Nick Clegg and Ed Miliband. They’re like a crop that has been cultivated for a certain temperature, a certain level of rainfall and a certain soil type - but then the climate changes and these crops don’t fit any more. These are some of the least satisfying political leaders that we’ve had for a long time.