Trainer Jim Best has been found guilty at a rehearing of breaching the sport's rules regarding the running and riding of two horses in December of last year.
A British Horseracing Authority disciplinary panel ruled Best, from Lewes, had instructed conditional jockey Paul John to ride Echo Brava and Missile Man other than on their merits and that they were ''stopping rides''.
Panel chairman Sir William Gage said: "That being so, the findings against Mr Best under Rule (C) 45 in respect of both races necessarily follow because he did not give his jockey proper instructions.''
Best was also found in breach of the rule governing conduct prejudicial to horseracing.
The trainer, who denied all of the charges, was originally found in breach at a hearing in February.
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