Paul O'Neill is set for a trip to Horseracing Regulatory Authority headquarters at Shaftesbury Avenue next week after television cameras showed him appearing to headbutt a horse at Stratford on Sunday.
Having reviewed a video of the incident involving the John O'Shea-trained City Affair, the disciplinary panel of the HRA have decided to hold an inquiry.
The conditional rider had been unshipped by the gelding after arriving at the start and went on to finish fourth in the Claydon Horse Exercisers Novices' Selling Hurdle.
"We haven't got a date set but we are going to go for some time next week - our inquiry day is usually on the Thursday," explained HRA spokesman Owen Byrne.
O'Neill said of the incident: "The horse had been very unruly leaving the parade ring and when we went to look at the last hurdle before hacking down to the two-mile start, he started reversing when we got to the hurdle and went under a railing which he lifted out off the ground.
"It took me five minutes to leave the railings and get him down to the start which I had to do as gently as I could.
"When I got to the start he headed straight for a car with me, stopped five feet from the car, whipped round and dropped me.
"I landed on my feet, but a bit awkwardly for my knee and I was a little bit angry then, but I've never done anything like this before and I'm glad to say the horse is OK after it and I have spoken to John O'Shea."
He added: "I would just like to say to the public that I'm very sorry they had to see such a thing. I've never done it before and it will never happen again." n Jean-Pierre Guillambert and Jamie Spencer received one-day bans for failing to ride to the draw in the opening race at Yarmouth.
Guillambert and Spencer finished first and second
aboard Princess Georgina and Stargazy respectively in the European Breeders Fund/Carlsberg UK Maiden Stakes.
The former will be sidelined on August 6, while Spencer will serve his suspension on August 10. n James Bethell confirmed that Mine will attempt to land another high-profile success in Saturday's totesport International at Ascot.
The evergreen eight-year-old landed an unprecedented hat-trick of wins in Newmarket's Bunbury Cup earlier this month, having previously done best of those drawn unfavourably high in the Royal Hunt Cup at Ascot.
While his handler is mindful of the strong opposition at the weekend, Bethell feels Mine will acquit himself well once more - despite having to shoulder a 3lb penalty in the £150,000 contest.
He said: "John Reid's just been up and had a sit on him this morning and he's very pleased with him.
"He seems in as good form as when he went to Newmarket, though obviously it's a tough race."