To be brutally honest, it's simple economics. If they want to come into cycling, sponsors need to know the team they are funding is clean, otherwise the risk is just too great.

I'm an accumulation of every single thing I've done, good and bad.

Now there are two or three teams who are very ethical in their outlook who have opened up the economic benefits and that is probably going to be a turning point in the sport.

I was awarded 'Most Aggressive Rider of the Day', generally given to the most spectacular loser of the day.

I like my hands. Which is lucky as I have to spend all day looking at them on the handlebars.

I had grown used to getting a pat on the back and being told after a good result: 'Well done, David - you should be happy, you're the first clean rider.

I'll go [racing] until my body won't let me any more. Someone said to me: "The day you stop, you won't be able to get back on the same way as when you did as a pro." I want to delay that kiss goodbye as long as possible.