Jockey Martin Dwyer is recovering from a fall in which the impact was so strong it reportedly split his helmet.
The rider fell from Columbian Roulette at Southwell last Friday (3 January).
The 3-year-old colt, trained by Charlie Hills, jinked to the left in the final furlong of the race, unseating Dwyer. He was left unconscious for 6 minutes and suffered concussion.
He was taken to hospital in Nottingham, where all head scans came back clear.
Dwyer now looks set to be out for up to 3 weeks. He will be allowed to return to riding once he has been passed by British Horseracing Authority (BHA) doctors.
The jockey, who won the 2006 Derby aboard Sir Percy, was last year banned by Indian stewards for allegedly preventing his mount, Ice Age, from running on its merits at Mumbai on 17 February. He appealed and the 56-day ban was not reciprocated by the BHA.
