A motorcyclist who died after crashing into a sign wasn’t discovered until the next morning, an inquest has heard.
Jack Guinchard had been riding his Yamaha motorcycle on Grays Park Road, Stoke Poges when he lost control and crashed off the road.
An inquest at Beaconsfield Coroners Court heard how he attempted to break but collided with a road sign, coming to a stop in an area of vegetation.
The incident happened at around 11.30pm on July 14, 2023 – though the rider was not discovered until around seven hours later when other drivers spotted the debris.
A builder who was on his way to work at around 6.55am the next day spotted what looked like bits of car and stopped, before discovering Mr Guinchard’s body.
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The police were called but the 32-year-old was pronounced dead.
Speaking at the inquest on Tuesday, a forensic collision investigator at Thames Valley Police said officers examined the scene as well as CCTV footage from a nearby house.
He said Mr Guinchard’s bike appeared blurry on the footage, suggesting he was travelling at a speed “twice that of other vehicles around a similar time travelling through that camera”.
“At the time of the collision, the weather and road surface were dry.
“There is nothing there that suggests there was anything wrong with the braking system. Breaking has been applied and it has been effective.
“A vehicle should be able to travel around that bend somewhere between the mid-50s and have no problem.”
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Asked whether he thought speed was a factor in the crash, he said “I think it is highly likely”, adding: “Twice the speed limit is probably a reasonable assumption.”
A post mortem found the motorcyclist suffered a number of injuries including multiple fractures and disruption to his liver and kidneys.
A small amount of ethanol was found in his body, but the pathologist said this was a “very very small amount which may indicate not any alcohol taken at all”.
In a statement, one of his friends, Alexandra said: “Jack has always been a safe rider by me. He was never showing off.”
Assistant coroner Gemma Brannigan concluded that Mr Guinchard had died as a result of a road traffic collision with no other vehicles involved.
The incident took place near the junction with Church Lane.
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