Five police officers have received medical attention after becoming unwell during surgery to protect the Queen’s funeral in Westminster.
A police officer, dressed in a full ceremonial uniform and white gloves, was carried away on a stretcher by two members of the Royal Navy before the ceremony began.
The Metropolitan Police said the man had recovered and four other officers received “medical assistance after becoming unwell”.
Two of the officers fell ill in the Mall leading to Buckingham Palace, two nearby on Horse Guards Parade and one next to the Victoria Memorial. All have recovered.
It came days after a guard passed out watching over the Queen’s coffin as she lay in state in Westminster Hall.
Thousands of police officers have been deployed as part of the largest security operation in the history of the Metropolitan Police.
Police have moved to London from across the UK to bolster their numbers, while services have been extended and rest days have been canceled for some officers.
Alongside uniformed officers along the route of the Queen’s funeral processions and guarding Westminster Abbey, armed officers patrol alongside sniffer dogs, snipers, horses, boats and helicopters.
Deputy Assistant Commissioner Stuart Cundy described the Queen’s funeral as the “largest deployment of officers in an operation the Metropolitan Police has ever undertaken”.
He said the force, along with government and intelligence partners, had “considered a range of potential threats and incidents”.
The planned scenarios include terror attacks, criminal activity, disruptive protests, mass masses and crushes.
Mr Cundy said the stabbing of two police officers on Friday morning, while unrelated to the Queen’s death, highlighted the risks at stake.
“It makes it clear that all officers on duty, with support from the public, should remain vigilant and flag anything they are concerned about,” he added.
“An incident like this is always something we are always well aware of when it comes to major events.”
The operation to protect hundreds of world leaders, dignitaries and high profile figures is the largest of its kind in Britain’s history.
After the Queen’s funeral at Westminster Abbey, her coffin will be taken to Windsor for a commitment ceremony.
Airport-style security, including scanners and bag searches, will be on hand for members of the public wishing to watch the event near the castle, while Thames Valley Police will also use automatic number plate recognition cameras and drones for the security operation.