We are testing more after races and less at trial sessions, but the number of tests are more or less the same over recent years – what has changed is the science employed by the labs which can find more minute levels of substances.

We also now have the ability to test hair samples, which give lifetime results – cocaine is a stimulant and therefore could be performance enhancing.

However, the cases we have come across are probably down to contamination from people’s hands etc. as the levels are so low.

The levels we have been detecting, measure in thousands of a nanogram would probably have no effect at all.

However, the damage to the image of the sport is very significant. That’s why a lot of positives lead to a charge of bringing the sport into disrepute.