But I am an optimist about Britain; and the difference between an optimist and a pessimist is not that the optimist believes the world is wonderful and the pessimist believes it's beset by challenges; the difference is the pessimist believes we will be defeated by them; the optimist thinks the challenges can be overcome.

The thing always is to go to where people really are and what they're really feeling about life.

If we don't act now, then we will go back to what has happened before and then of course the whole thing begins again and he carries on developing these weapons and these are dangerous weapons, particularly if they fall into the hands of terrorists who we know want to use these weapons if they can get them.

There's a deep affection and respect for the Queen and the monarchy in the U.K. But Diana was an extraordinary, iconic figure and her death sparked a fierce reaction, part grief and part anger at her being taken away. It was very fraught.

Bill Clinton has been a true leader of the western world. He has been a friend and a counsel to me and other leaders right around the world.

I think I made the wrong career choice

Because I happen to believe that the best policy solutions lie in the center ground, then I want to see, how does the center revitalize itself? How does it develop the policy agenda for the future? And how do we link up people who have the same basic ideas and attachments to the same basic values across the world?