Prince Harry has arrived at Clarence House to see his father - a day after the King's cancer diagnosis was revealed.
The Duke of Sussex flew in from LAX in California, where he has lived since 2020, and landed at Heathrow Airport in London on a British Airways flight on Tuesday afternoon.
He was photographed on Monday afternoon being driven into Clarence House, where the King is recovering after receiving treatment.
Shortly after, the King and Queen were seen for the first time since his diagnosis was announced.
The royal couple returned to Buckingham Palace and are thought to have left by helicopter for Sandringham.
Traffic was briefly stopped on The Mall outside Clarence House just after 3.30pm and two black SUV vehicles were driven out.
The cancer was found after the King underwent treatment for an enlarged prostate - although Buckingham Palace said he does not have prostate cancer.
The King personally called both Harry and the Prince of Wales - as well as his siblings the Princess Royal, the Duke of York and the Duke of Edinburgh - to share news of his health, the palace said.
Prince William is understood to be in regular contact with his father.
The monarch has begun a schedule of regular treatments and is said to be receiving expert medical care from a specialist team.
But he has been advised by doctors to postpone his public-facing duties.
Relations between the monarch and his younger son have been strained for some time after Harry quit his royal duties in early 2020 to live in the US with his wife Meghan and two children.
The Duke of Sussex was critical of his family in his book, Spare, which was published last year. The autobiography revealed damning revelations about the prince's relationships with his father and brother.
It is understood that Prince Harry has no plans to see his elder brother during his visit to the UK.
A royal biographer has told Sky News a visit from his son could be a "tonic" to His Majesty.
The feud in the Royal Family is "obviously an issue which has hung heavily over him", Hugo Vickers said.
Separately, Sky's royal correspondent Laura Bundock said there has been "a lot of movement" around the royal residences this morning.
While the Duke of Sussex is meeting with his father, a helicopter has landed in the grounds of Buckingham Palace, which is just a short distance from Clarence House.
"We don't know what that helicopter's for, who it's taking anywhere, but it still hasn't taken off again," Bundock said.
The news of the King's diagnosis is "still very much sinking in", she added.
(c) Sky News 2024: Harry arrives at Clarence House to see father - day after King's cancer diagnosis revealed
PHOTOS: Ed Sheeran Makes Surprise Visit To Brighton School
Hove Bar Licence Reviewed After Years Of Complaints
Record Number Of Wild Swimming Spots Designated As Bathing Sites - With Three More In Sussex
Council Calls On West Sussex Residents To Consider Fostering
Meghan, Duchess Of Sussex, Says Nigeria Is 'My Country' On Visit With Prince Harry
Two Men Wanted In Connection With Hastings Fatal Collision
M25 Reopens Seven Hours Ahead Of Schedule
More 'Live' Bus Information Screens To Be Installed In West Sussex
Rare Bee Found In Lewes
Event Bookings Go Live For Worthing Festival ‘24