The teenage son of lottery winners Adrian Bayford and his ex-wife Gillian was reportedly injured when he was hit by a car on the grounds of his father’s mansion in Cambridgeshire on Monday.
His sister allegedly sounded the alarm after being thrown from her bicycle and through a fence.
An air ambulance was reportedly dispatched to the scene of the incident in the 148-acre estate, but the boy was transported by road to hospital, reports The Sun.
The quad was said to have been a gift bought for the teenager by his father Adrian, 49, according to the newspaper.
He would have remained in intensive care on Sunday evening, with his family, including mom Gillian, 48, at his bedside.
Adrian and Gillian won a jackpot of £ 148million playing EuroMillions in 2012.
The couple then broke up and Adrian recently moved to the remote £ 12million, Grade II listed mansion.
Gillian, who now lives in Scotland, is said to have rushed to her son’s bedside.
A family friend told The Sun, “He’s in intensive care and he’s in bad shape. He’s sedated right now and everyone’s worried.
“Her sister is really shaken by all of this. It’s a nightmare. “
The accident happened around 3 p.m. last Monday. A police spokesperson said: “We were called with information that a car and a quad had collided on private land.
“The pilot of the quad, a teenager, was taken to Addenbrooke’s Hospital in Cambridge with serious injuries. “
The Bayfords won their immense fortune in 2012, and at the time it was the second biggest lottery win for Britain.
They then purchased their sprawling 19th-century country house Horseheath Lodge – an 189-acre estate that includes stables and outbuildings with a cinema, billiard room, bar, workshop and shops.
There’s also an outdoor pool, along with six other cottages, horse riding facilities, and a barn with on-site offices.
But the couple, who had been married for nine years, parted ways the year after winning the huge prize and Gillian returned to Scotland.
Former postman Adrian also bought property closer to his children in Scotland, before putting the family’s former Georgian mansion up for sale in Linton, Cambridgeshire earlier this year.
Adrian had moved for a while and had put the lavish mansion on the market several times.
Last August, he was forced to tighten security at the estate after squatters started using his swimming pool and gym.
However, reports say he recently chose to stay in the six-bedroom mansion, while his ex-wife still lives in Scotland with her property developer husband.
Gillian welcomed a daughter with her new husband Brian Deans at the age of 48.
The Mirror contacted Cambridgeshire Police and attempted to reach the Bayford family for comment.