The Irish Horseracing Regulatory Board panel dismissed two appeals regarding the Pretty Polly Stakes run at the Curragh on Irish Derby weekend.

The George Boughey-trained winner Via Sistina drifted markedly right-handed up the straight causing interference to those in behind.

Connections of the second-place filly, Stay Alert, announced an appeal against the result with Hughie Morrison's four-year-old hampered as she began to mount her challenge.

On-course stewards deemed that Via Sistina had not improved her finishing position as a result of causing the interference and on Tuesday morning it was confirmed that the result would stand.

However, Jamie Spencer, who also appealed against his six-day ban for careless riding likewise found his appeal unsuccessful.

Spencer teamed up with Charlie Hills to land the Group 1 Queen Elizabeth II Jubilee Stakes on Khaadem at Royal Ascot in June but with the Newmarket-based rider now ruled out on July 15, 17-20 and 22, the pair will not be reunited in this Saturday's July Cup.

Khaadem now looks set to be partnered by fellow recent Group 1-winning jockey Rob Hornby, who enjoyed his fourth top-level success on Westover in the Grand Prix de Saint-Cloud last weekend.