Robbie Dunne has appealed against his 18-month ban for bullying and harassing weighing-room colleague Bryony Frost.

Dunne, 36 – who denied all but one of the charges brought against him – was banned for 18 months, three of which were suspended, after being judged to have engaged in conduct at the track, online and in the weighing room that was prejudicial to the integrity, proper conduct and good reputation of racing following an independent British Horseracing Authority disciplinary panel hearing in December.