The Prince of Wales and The Duchess of Cornwall are in Norfolk visiting the annual Sandringham Flower Show.
Now in its 132nd year, more than 20,000 visitors are expected throughout the day.
The Prince of Wales and The Duchess of Cornwall will visit the Sandringham Flower Show today.
It is the 132nd time the show has been held in Sandringham Park and 20,000 visitors are expected during the day.
Leading designers will be exhibiting display gardens and there will be around 200 trade stands. Profits from the show will go to local charities.
The Health and Safety Executive is now leading the investigation after a Royal Estate worker at Sandringham had to be rescued from a lake .
The gardener who is in his 30's was on a ride-on lawn mower when he fell into the water. He remains in a critical condition at Addenbrookes Hospital. Norfolk Police say they are no longer leading the investigation into the incident.
A worker from the royal estate at Sandringham in Norfolk is fighting for his life after he became trapped underwater in a lake.
The man, believed to be in his 30s, was pulled from Lower Lake in the grounds of the Queen's Norfolk home on Monday afternoon.
It is understood he had become trapped beneath a ride-on lawnmower. Police and colleagues performed emergency resuscitation until paramedics arrived.
He was taken to Addenbrooke's Hospital in Cambridge where he is critically ill. Police and the Health and Safety Executive are investigating.
Click below to watch a report from ITV News Anglia's Russell Hookey at Sandringham
A worker on the royal estate in Sandringham in Norfolk is believed to have been underwater "for a number of minutes" after the grasscutter he was riding went into a lake.
The man, in his 30s, had apparently become trapped underwater by the grasscutter. He was taken to Addenbrooke’s Hospital by air ambulance where he remains in a critical condition.
Emergency services were called to the scene at Lower Lake, close to the B1440 at around 1.30pm on Monday.
Two police officers and a colleague from the estate retrieved the man from the water and began CPR before paramedics arrived.
Norfolk Police and the Health and Safety Executive are continuing to investigate the accident.
A worker on the royal Sandringham Estate in Norfolk is in a critical condition after being rescued from a lake.
Emergency services were called to the Lower Lake area just after 1.30pm on Monday afternoon.
Click below to watch a report by ITV News Anglia's Russell Hookey
Inspectors from the Health and Safety Executive (HSE) are at the scene of an incident at the Royal estate at Sandringham.
A spokesman for the HSE said:
No formal investigation has been launched, but we do have inspectors at the scene with police who are making initial enquiries.
A spokesman for Norfolk Police said:
"The man was retrieved from the water and was taken to Addenbrooke's Hospital by air ambulance for treatment. He is currently described as being in a critical condition.
"Police and the Health and Safety Executive are carrying out a joint investigation into the incident."
A worker on the Sandringham Royal estate is in a criticial condition at Addenbrooke's after being rescued from a lake.
The man, in his 30s, was rescued from Lower Lake and taken to the Cambridgeshire hospital by air ambulance. He is in a critical but stable condition.
Police and the Health and Safety Executive are carrying out a joint investigation into the incident.
Emergency services were called to the Norfolk retreat at about 1.30pm yesterday after reports that an estate worker, in his 30s, had fallen into the Lower Lake while operating a ride-on lawn mower.
It is understood the Queen was at Sandringham on a private visit less than an hour later.