Hughie Morrison will appear before the British Horseracing Authority's disciplinary panel on December 19 and 20 after Our Little Sister failed a drugs test at the start of the year.
Our Little Sister tested positive for banned substance nandrolone following a race at Wolverhampton on January 14. The four-year-old filly finished last of eight runners in an extended two-mile handicap, in which she was sent off at odds of 12-1.
Sceau Royal barely came out of second gear as he got back on the winning trail in the Highflyer/Million In Mind 4-Y-O & 5-Y-O Novices' Chase at Warwick.
Moon Racer could return to action over hurdles in the new year after making a full recovery from a bout of colic.
The David Pipe-trained eight-year-old, winner of the Champion Bumper at Cheltenham in 2015, was last seen finishing sixth in the Crabbie's Top Novices' Hurdle at Aintree in April.
Traffic Fluide will take his chance in Saturday's Betfair Chase at Haydock rather than tackle an alternative engagement at Ascot.