Prince Philip, 99, transferred to another hospital after 14 days battling infection

Prince Philip has been transferred to another hospital after 14 days fighting an unknown infection.

The Duke of Edinburgh, 99, was admitted to King Edward VII's Hospital in London on Tuesday, February 16, as a precautionary measure after becoming unwell.

Earlier on Monday, a police van blocked the side street at the hospital, while officers stood along the same road, as he was moved.

At a rear entrance umbrellas were used to shield the gap between the hospital and the NHS ambulance.

The duke's previous longest stay in hospital was in 2013, when he had an operation on his abdomen.

According to the Palace, Prince Philip's admission is not related to coronavirus.

The Queen and other royals have continued with their duties while the duke has been in hospital, although some have paid a visit.

The duke was admitted to hospital on February 16 (Getty Images)

Prince Charles, 72, paid the duke a 30-minute visit last weekend.

But his youngest son, Prince Edward, 56, told Sky News on Tuesday that his father was getting better.

The Earl of Wessex said: "As far as I'm aware, he's a lot better ... so he's looking forward to getting out which is the most positive thing.

Edward added with a laugh that his father was "just a bit" frustrated at being in hospital.

He said: "You can only watch the clock so many times and the walls are only so interesting.

Staff shield the exit with umbrellas alongside an ambulance outside the rear of the King Edward VII Hospital (PA)

A nurse walks past police officers on duty at the main entrance to King Edward VII hospital where Prince Philip has spent just over two weeks (AFP via Getty Images)

"We've had some lovely messages from all sorts of people and we really appreciate that and so does he, I've been passing them on."

Prince William - the duke's grandson - has also revealed that the senior royal is "OK" and hospital staff were "keeping an eye".

The Queen is also said to have made a touching gesture to her husband by wearing a silver brooch from their engagement in her latest public appearance.

During a video call with health leaders delivering the Covid-19 vaccine, she called on the public to step up for their jab and issued a rebuke to anti-vaxxers.

And the British monarch was seen wearing a brooch she first wore for her engagement to the Duke 74 years ago.

The diamond clematis was first worn by Her Majesty in her official engagement photos with Prince Philip in July 1947.