Kieren Fallon has reportedly tested positive for a banned substance when riding in France this summer.
The Daily Mail has reported that Fallon failed a drug test within weeks of reacquiring his licence after he had been suspended for six months following a positive test at Chantilly in June 2006.
The French authorities will not administer a ban until the B sample returns from the authorities.
Fallon has had 29 rides in France since June 10. But the failed test did not occur at Longchamp’s October meeting where he won the Prix de l’Arc de Triomphe on Dylan Thomas.
A Coolmore spokesman told the Mail: “We are aware that the B sample has not yet confirmed the test. It did not occur at the Arc meeting.”
Paul Struthers, spokesman for the British Horseracing Authority, declined to comment on the story.
“It’s difficult for us to comment on it as it has occurred under the jurisdiction of another country,” said Struthers. “It really would be difficult for us to make any comment about it.”