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.

My epiphany came in that police cell: I realized I was about to lose everything and it didn't bother me, not in the slightest. I'd come to hate cycling because I blamed it for the lie I was living.

Survival is the main objective. There are going to be some awful days, I know that from my background in the sport.

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.

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 might have changed, but that did not mean the sport had.

There will always be cheaters. It is human nature. It will never be 100 percent clean, in any sport.