Jamie Moore was taken to hospital on Monday after taking a crashing fall from a horse at Fontwell who suffered a fatal injury.
Moore, 38, was believed to have briefly lost consciousness after Auriferous, trained by his father Gary Moore, came down at the fourth last hurdle.
Auriferous was in third place when putting in a short stride at the flight, propelling Moore out of the saddle onto the ground where he appeared to be galloped over by another runner who was unable to avoid him.
