Milton Harris has had his training licence suspended by the British Horseracing Authority pending a hearing in January.
Harris, who returned to the training ranks in 2018 following a seven-year absence from the sport due to financial issues, saddled Knight Salute to land the 2022 Grade 1 Jewson Anniversary 4-y-o Juvenile Hurdle at Aintree.
The suspension comes after horses trained by Harris were not permitted to run at Ludlow on Thursday, with the BHA ruling Balboa and Giddyupadingdong were "not qualified" to compete in their respective races.
A BHA spokesperson said: "Following a hearing before the chairperson of the independent judicial panel of the BHA, Mr Harris's licence has been suspended pending a licensing committee hearing in January.
"This is as a result of a breach of the conditions on his licence and related matters."
Harris' last runner came at Plumpton on Monday, and he has trained 33 winners this season at the time his licence was suspended.