Frankie Dettori calls in London Olympics drug-testing expert in race to ride in the Derby Dettori had been due to make his comeback this week following a six-month ban for testing positive for cocaine, but it has been delayed because France Galop, the sport's governing body across the Channel, say there is a "glitch" with a drug test Dettori took on April 22. Until Wednesday, France Galop had refused to inform either the BHA or Dettori about what the issue was with the April 22 test. But on Wednesday night there finally seemed to have been some movement in the stalemate, and the BHA agreed, in principle, to reconvening its licensing committee for Dettori, although the meeting is dependent on the jockey and his solicitor, Christopher Stewart-Moore, furnishing the BHA with the information it requires from France Galop's medical committee and specifically details of the "glitch" in his April 22 test. No date has yet been set. It is understood that France Galop are now, at least, beginning to talk to Dettori's people, which is a significant step forward from the two line email, with no explanation, which the jockey received from them on Friday. Dettori, meanwhile, has engaged the services of Professor David Cowan, the head of the Kings College Drug Control Centre in London, which was responsible for overseeing the drug testing of all athletes at the London Olympics last year. The professor is expected to advise him on the April 22 test. Nevertheless, with every passing day, the chances of all this coming together in time for the jockey to have his licence back in time for the Derby get slimmer. He continues to ride out and, according to his manager Peter Burrell, is "8st 1lb and set to go," but as yet, after more than six months in the wilderness, Dettori remains no more than a jockey-in-waiting. "We're doing everything we can to get things moving," said Burrell. We've got to the transfer of information stage, which is a big improvement. For their part the BHA maintained they had not been sitting on their hands in an effort to get the relevant information. Robin Mounsey, their media manager, said: "We have today spoken to France Galop again regarding Frankie Dettori. They have confirmed to us that the issue sits with their Medical Committee and that the specifics of the case have to remain confidential between that committee and Mr Dettori. After reports that he had 'failed" a test in France there seemed to be conflicting opinions as to the seriousness of any such failure. The French testing is non-specific, so would show up anything in the system from an over-the-counter painkiller to a prohibited substance. The legal view is that as Dettori was not a licensed individual at the time he was not subject to the Rules of racing and therefore it is irrelevant if a prohibited substance showed up in the test. The BHA's view is, naturally, slightly different and sources there insist the return of his license were he to have tested positive for a prohibited substance would be conditional on his crossing a number of hurdles, one of which may be a series of clear drug tests. Their view is that a licence is not a right but a privilege and that any number of negative tests would not excuse one positive test.