I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.

I've taken many knocks over the years but it has only made me stronger and more determined to succeed.

I think business leaders all over the world should not just think of how we can make lots of money, which is fine, but to take some of the problems in the world and get out there and tackle them using business. I think that if businesses do that we can get on top of these problems.

Virgin, is how good you are with people. If you're - if you're good with people and you've got - you know, and you really care, genuinely care about people then I'm sure we could find a job for you at Virgin. I think, you know, that, you know, that the companies that look after their people are the companies that do really well. I'm sure we'd like a few other attributes, but that would be the most important one.

Space travel will be like every other business. There will be competitors. . . . Thirty months from now, I'm confident we'll be flying people into space.

Age isn't as important so long as you are surrounded by people you love, doing things you passionately believe in.

I set up this magazine called Student when I was 16, and I didn't do it to make money - I did it because I wanted to edit a magazine. There wasn't a national magazine run by students, for students. I didn't like the way I was being taught at school. I didn't like what was going on in the world, and I wanted to put it right.