You can be an Olympic champion in 9.5 secs, but to be the greatest, there's more to it. It takes a bit of forethought and a lot of mental application.

Having the ambition of becoming Olympic champion is a whole different ambition from wanting to be the greatest.

I have the mentality of a winner. I first went to the Olympic Games when I was 17, three weeks after my O-levels, and I remember sitting in a dining-hall filled with the world's best athletes.

I want to be an Olympic champion.

Kids are starting at such a low base rate in terms of fitness that it's taking them years to catch up to where people like me started from. Every little bit is making it more difficult for kids to succeed on a world stage.

The decathlon takes so long to learn that people who are good athletes don't want to go back to the beginning again.