The next Tory leader would have to unify his party and ensure that Britain stood tall in the world.

It is easy to make promises - it is hard work to keep them.

I'm a one-nation Tory.

Some people play the piano, some do Sudoku, some watch television, some people go out to dinner parties. I write books.

If we judged everybody by the stupid, unguarded things they blurt out to their nearest and dearest, then we wouldn't ever get anywhere.

The crucial thing is to look in an informed way at what's going on. Look at the way in which we are forced by our imbalanced system to push away people who might contribute mightily to the NHS.

The job of mayor of London is unbelievably taxing, particularly in the run-up to the Olympics.