UK Sport's quarterly anti-doping report has highlighted the cases of two jockeys who tested positive for cocaine.

Three other jockeys also returned positive results for drugs which are not banned under Jockey Club rules.

Michelle Verokken, director of Drug-Free Sport at UK Sport, said she had concerns over the Jockey Club's attitude to the issue of drugs use in racing.

"It raises question marks over whether enough is being done to create the most effective programme for a sport," she told BBC Sport.

"We have raised the matter with the Jockey Club and we will see what the response is.

Cocaine

"The Club want to have their own standards but if the jockeys themselves are concerned about these findings then we need to help progress matters."

Jockey Club spokesman John Maxse confirmed that Dean Gallagher was the licensed jockey revealed in the report as testing positive for cocaine.

Another jockey also tested positive for cocaine but did not have a licence at the time while a sample taken from a third was found to contain ephedrine.

Ephedrine is banned by the International Olympic Committee but not by the Jockey Club.

Dr Michael Turner, the Jockey Club's medical adviser, told BBC Sport: "Racing is a particularly different environment.

"We are looking for performance-impairment as opposed to performance-enhancing.

"The horse is by and large the athlete and we test the horse for everything."

Overall, UK Sport's figures revealed the proportion of positive drugs tests in British sport was falling.

Key findings:

• UK Sport carried out 4116 tests in the period April-September 2002, of which 57 were reported for further investigation.

• Of those 4116 tests, 1142 were conducted out of competition.

• 978 tests were carried out at the Commonwealth Games, the largest ever testing programme by a national anti-doping agency.

• No athlete tested positive for EPO at the Commonwealth Games.