there are really very many. Again, as a child, it was obviously those scientists which had lived in the past that had made such an important mark in science history.

None. Unfortunately, we are in an age of antiheroes.

My father, because he's a positive man with an enormous amount of compassion. My mother passed away four days ago.

People ask me sometimes, who inspires you, Mr. President? Those quiet heroes all across this country -- some of your parents and grandparents who are sitting here -- no fanfare, no articles written about them, they just persevere. They just do their jobs. They meet their responsibilities. They don't quit. I'm only here because of them. They may not have set out to change the world, but in small, important ways, they did. They certainly changed mine.

I'd have a good, encouraging start in school – I think I'd be a different person, with fewer anxiety attacks.

Most recently, going to a 1D concert at Wembley with my nine-year-old daughter. Seeing her dream becoming real. The highlight was meeting a nice man in the elevator when it was over, who gave her Harry's autograph. Turned out to be his dad. To my daughter that was like meeting the archangel Gabriel.

A song by Ellie Goulding – I am not telling you which one.

Coming back to work after being ill. A year ago I couldn't see that happening. I am still pinching myself.