Marco Ghiani, last season’s champion apprentice jockey, has been “temporarily” suspended by Britain’s Equestrian Authority.
The Italian was not allowed to make two trips at Brighton on Monday, with the manager’s report saying the BHA considers Ghiani “unfit” to play, and he has missed two scheduled trips. Another show at Leicester on Tuesday.
A BHA spokesman declined to elaborate further on the reasons on Wednesday, saying: “The BHA does not comment on ongoing investigations or speculation surrounding possible investigations.”
The Professional Jockeys Association (PJA) also did not wish to comment when contacted.
Subsequent reports showed that the 23-year-old had tested positive for banned substances.
Ghiani had a breakout win at Royal Ascot last year over Saeed bin Suroor’s Real World in the Royal Hunt Cup.