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.

I can swim I'm not bad, but not great.

I deliberately returned slowly to training after Raphael was born and everything, apart from being bitten by a dog while out training in Monaco at the beginning of the year, has gone pretty well.

Doing the long endurance stuff seems to have given me the strength to sustain the speed. I think my body is just a lot stronger (thanks to the marathon)... By increasing the long runs, I found that does not take anything away from the speed but increases the strength on the track.

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.

As an athlete, there are advantages being with a team and getting regular physio...

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.