A millionaire businessman who was competing in a high-speed racing event has been airlifted to hospital after coming off his motorbike.
Zef Eisenberg had been riding the Madmax turbine, a gas turbine engine motorcycle, at the Straightliners "Top Speed" event at Elvington airfield in North Yorkshire.
Competing in the omega class, the businessman, who founded the sports nutritional product company Maximuscle, came off the high-powered machine during his timed track run at around 2pm.
A spokeswoman for the Madmax race team, owned by Mr Eisenberg, told the Press Association he has "had an accident racing" and is understood to have sustained a suspected broken pelvis.
"He is in a stable condition and is receiving the very best care. The bike and race vehicles are being returned to Guernsey via his team," she added.
The 43-year-old has been airlifted to Leeds General Infirmary for treatment.
Press Association photographer Danny Lawson was at the scene.
He said Mr Eisenberg had travelled down the airfield on his bike during the competition, before passing through the time gate.
It was after he entered the slow-down area that it is thought the incident took place.
"Something happened out of sight and there was a big puff of smoke," he added. "They stopped the event for at least an hour and a half."
Organiser of the Straightliners Top Speed event, Trevor Duckworth, said they are working to establish what happened and do not yet know the full details.
"The paramedics and medical staff were with him very quickly and dealt with it brilliantly," he said.
Mr Duckworth, a former motorcycle racer, said some racers have hit more than 250 mph but stressed that it is "not all about speed".
"We have had a garden shed that has done 95 mph, that is what it is about - people doing different things. We have had a supermarket trolley doing 79 mph.
"We have had a mono-wheel doing 64 mph - all new world records," he added.
Part of the Guernsey-based Maxicorp group, the Madmax race team website states they are "most known for its dedication to racing and building turbine-powered motorbikes for extreme speed".
Adding: "Madmax racing holds numerous Guinness, world, British and local records."