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.

It's important that athletes can compete on a level playing field. And youngsters coming into the sport can know that if they are working hard and training hard, they'll see a true reflection of where they stand and what they can achieve worldwide and not be swayed by people who are cheating.

I have achieved a lot and I'm grateful for that - I'm just a bit greedy because I want to add the Olympics. It's once every four years - everyone wants it and very few people get it.

I don't feel guilty in having pleasure!

It's totally different from last year because I came in with good shape with no health worries so it was about going out there and running well and enjoying it.

From my training I can get a good idea of what I'm capable of.

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