Adrian Heskin will have surgery on Friday after breaking his leg in a fall at Taunton.
Heskin was riding Paxman for Evan Williams in the second division of the two-mile novices’ hurdle when he fell at the second last.
“I’m absolutely gutted to report that I have broken my left leg after a fall at Taunton today,” Heskin told his Unibet blog.
“I feared the worst immediately, and it wasn’t looking good when I went for the X-ray this afternoon.
“It’s far too early to tell how long I will be out for, as the doctors and specialists are still looking at it.
“There is never a good time to pick up such an injury, but it is especially frustrating when it is in the middle of the season proper, with all of our good horses coming out in the big races and trials.
“I’ll let the dust settle, and get more medical advice and opinion before updating everyone further. I really don’t have any details yet, so I am still in the dark.
“I am having an operation tomorrow, though.
“We all know the risks though, and you just have to get on with it.”
Among Heskin’s scheduled rides at Cheltenham on Friday was promising novice chaser The Worlds End.