Dai Walters has been transferred to intensive care to receive further treatment for injuries sustained in a helicopter crash.
The multi-millionaire racehorse owner was one of five people involved in the accident in Wales on Tuesday. Complications with Walters' health have led to the latest development, his daughter Sarah Llewellyn said.
The news came just hours before one of the horses carrying his blue and white colours, Al Dancer, won at Aintree. The grey is trained by Sam Thomas, who was also in the aircraft when it came down in woodland near Ruthin earlier this week, minutes after taking off.
