"I was going to say 'my friend Stuart', but I suppose he's not a friend any more. I seem to have lost a number of friends in the last few years. I don't mean that I've fallen out with them, in any dramatic way. We've just decided not to stay in touch. And that's what it's been: a decision, a conscious decision, because it's not difficult to stay in touch with people nowadays, there are so many different ways of doing it. But as you get older, I think that some friendships start to feel increasingly redundant. You just find yourself asking, "What's the point?" And then you stop."