Jockey Sam Waley-Cohen will miss next month’s Grand National at Aintree if a seven-day riding ban is upheld, says the British Horseracing Authority.
The leading amateur jockey, 33, was suspended after he was adjudged to have prematurely stopped riding Long Run in the hunter chase at Carlisle on Sunday.
Stewards ruled 2011 Cheltenham Gold Cup winner Long Run, who was retired after the race, could have finished third rather than fifth.
Waley-Cohen has said he will appeal.
He told the BBC he had the welfare of the horse – who was bred, owned and trained by his father Robert – in mind.
The BHA says Waley-Cohen’s suspension will cover days on which there are races for amateur riders – and these include the Thursday and Saturday of the Aintree meeting.
That would rule him out of the Foxhunter Chase on 7 April and the Grand National two days later.
Waley-Cohen has won six times, including three Foxhunter victories, over the Grand National fences – more than any other jockey in the modern era.
His best finish in the National is runner-up, on Oscar Time in 2011.