You can't become a winner overnight, or even in a couple of years-it takes time... You will lose races and you will have to accept that, learn from it and believe that you'll win the next one, knowing that you'll probably lose that as well. All the time you have to keep believing that one day you will win.

The cheats always have a way of justifying their behaviour - everyone else is getting away with it, so why shouldn't I? But because they're so reliant on the drugs - and the drugs are not always perfect, you're not guaranteed to peak at a big event - they don't have the confidence to look in the mirror and know that they can go out and give their best. If you're clean and you've prepared well for a race, that's where you have an edge.

To represent your country at a home Olympics is something special and I'm over the moon to be selected for Team GB. I was pleased to get the qualifying time in Berlin earlier this year and my sole focus is getting in the right shape for London.

In the marathon anything can happen.

We, as athletes, have our suspicions about who's cheating, but I'm not convinced that the testing has yet caught up with what people are using or what they are using to disguise it.

Go in any direction..seeking out new sights just on the strength of your feet and the courage of your lungs.

For an athlete, the biggest pressure comes from within. You know what you want to do and what you're capable of.