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 am a bit of a lefty on some issues.

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.

Regulators are a backstop: they don't own banks. The governance at the top of our leading banks has been shown to be lamentably weak. No one at the top of Barclays will take responsibility for systemic abuse.

I don't feel comfortable with luxury, and I try to stay fairly normal.

When my job was attempting to predict future economic developments for the Shell oil company, I was frequently reminded of an Arabic saying: 'Those who claim to foresee the future are lying, even if by chance they are later proved right.'

There was, of course, a global financial crisis. But our Labour predecessors left Britain exceptionally vulnerable and damaged: more personal debt than any other major economy; a dangerously inflated property bubble; and a bloated banking sector behaving as masters, not the servants of the people.