Kieran Shoemark will be able to reapply for his riding licence at the end of May after serving a six-month suspension following a positive test for cocaine.
The 23-year-old has not ridden since November 24, with the British Horseracing Authority informing him of his test result four days later before suspending his licence.
Shoemark, who withing four days of being suspended checked into a rehabilitation clinic to deal with issues around alcoholism, faced a BHA disciplinary panel hearing on Thursday, with his suspension backdated to November 29, when a stop was first put on his licence.
The BHA tweeted: “K. Shoemark found in breach of Rule (D)65. He is ineligible to apply for a licence until May 29, 2019 as his licence has been suspended since November 29, 2018 but expired on January 16, 2019.”
Roger Charlton has been Shoemark’s main backer, with his 65 winners in 2017 including one at Royal Ascot for the trainer. He also came close to landing the champion apprentice title, missing out by just one win to David Egan.
However, after making a decent start to 2018, he suffered a fall at Lingfield in June which put him out of action for several weeks with broken ribs and a punctured lung.
Shoemark eventually returned to the saddle in late August, with the Charlton-trained Projection giving him a Group Three win at Ascot last October.