My time at Shell was a most valuable experience because it taught me to look at the world in a long-term way. Shell takes a 20-year view on events and plans for different scenarios. It makes you see the world as a kind of large matrix.

I have managed to infuriate the bank bosses; acquire a fatwa from the revolutionary guards of the trades union movement; frighten the 'Daily Telegraph' with a progressive graduate payment; and upset very rich people who are trying to dodge British taxes. I must be doing something right.

So I went into government with a clear mind about what the problems were, and what needed to be done.

When Gordon Brown becomes prime minister, the balance sheet that reflects his economic stewardship could look very sickly indeed. He could become Labour's biggest liability, not its most marketable asset.

I am a bit of a lefty on some issues.

My college, Fitzwilliam, was pretty good but unfashionable and I lived in digs so I was not part of the cloistered 'old college' environment, which frankly was a bit intimidating. But I worked hard and settled in by exploring politics and girls.

I think what is happening is I think first of all there is confidence in the U.K. economy. We're in a German rather than a Greek position in international financial markets, which is very positive and keeps our debt service costs down, and we're also beginning to see real evidence of rebalancing.