If I don't train enough, of course I'm nervous.

What can you do if a part of it is uphill? You can't work out another route. You've just got to run the one they give you. But they tell me London is a nice course. Even the cobbles, I hope, are not very much of a problem for me.

I used to run to school, 10k every day. And this at altitude, perfect preparation, really.

My school was six miles away from where I lived on the farm. I had to walk and run, there and back every day, through gorges and over rivers. If I was late, there was a very big stick waiting for me.

I have seen things few of my countrymen have. The first time I went on an aeroplane I couldn't work out how the lavatories worked up in the sky.

First, do enough training. Then believe in yourself and say: I can do it. Tomorrow is my day. And then say: the person in front of me, he is just a human being as well; he has two legs, I have two legs, that is all. That is mentally how you prepare.

Why should I say I will retire in three or four years? You retire the very moment you utter those words.