One day, we will look back and wonder how on earth we used to believe that depression was a lifestyle choice, only to be debated and taken seriously when an A List film star took his life, and the world filled with people saying how shocked and saddened they were.

May I share with you my earliest memory of a political row? It was with my mother, about the Queen - classic Freudian stuff, shrinks would say. I was eight, and refusing to watch the Queen's Christmas Day broadcast.

One day, we will look back and wonder how on earth we used to believe that depression was a lifestyle choice, only to be debated and taken seriously when an A List film star took his life, and the world filled with people saying how shocked and saddened they were.

Friends have suggested that I am the least qualified person to talk about happiness, because I am often down, and sometimes profoundly depressed. But I think that's where my qualification comes from. Because to know happiness, it helps to know unhappiness.

So here is one of my theories on happiness: we cannot know if we have lived a truly happy life until the very end. This view of life and death was reinforced by my close witnessing of the buildup to the death of Philip Gould. Philip was without doubt my closest friend in politics. When he died, I felt like I had lost a limb.

Paul Keating told us before we were elected that you can do deals with [Rupert] Murdoch without saying you were doing a deal. Did we do that kind of thing? Maybe. But from around about the turn of the century, I felt strongly that we had to do something about media ownership and self-regulation. Tony [Blair] disagreed.

There are many reasons for the decline in royal esteem. One is that so many of the royals are thick.