- By Sean Coughlan, Royal Correspondent, and Sean Seddon
- BBC News
King Charles has been photographed for the first time since his cancer diagnosis was announced, after the Duke of Sussex arrived in the UK to visit him.
The King and Queen were photographed in a car leaving Clarence House in London, and are now at Sandringham in Norfolk.
Prince Harry arrived in London after an overnight flight from the United States.
Buckingham Palace announced on Monday that the king, 75, had been diagnosed with a type of cancer and would step down from his public duties to receive treatment.
The palace revealed few details about the king's diagnosis, other than confirming that it was discovered during a recent procedure to treat an enlarged prostate.
His two sons were informed of his diagnosis before the announcement.
The King and Queen smiled and waved as they left Clarence House, their home in London, on Tuesday.
Charles and Prince Harry met for approximately 45 minutes before the King departed for his trip to Sandringham.
The Duchess of Sussex is expected to remain in the United States, where the couple lives with their two young children.
The BBC has learned that there are no plans for Prince Harry to meet his brother, the Prince of Wales, during his visit to London.
Prime Minister Rishi Sunak previously told BBC Radio 5 Live that the king's cancer was “caught early” and said he remains in “regular contact” with the monarch.
He said their weekly masses would continue while the king was being treated.
The speed with which Prince Harry rushed from California to visit his father in the United Kingdom seems great.
There have already been signs of the family growing closer, such as when the duke, 39, spoke to the king by phone on the monarch's birthday last fall.
But there were no signs of Prince Harry or Meghan heading out for Christmas or any other family get-togethers. Until now they remained at a distance from the rest of the royal family.
The tensions in the royal family – as described in Prince Harry Speer's memoirs – appeared not to be between him and the king, but between him and his brother, the Prince of Wales, and were fueled by the excesses of the tabloid press.
To that end, Prince Harry's recent trips to the UK have been more about the courts of law than the royal courts.
But even before this latest health news, it appears that Prince Harry and Meghan — who live in the exclusive community of Montecito in California — are planning more projects and travel.
They traveled to Jamaica for the film's premiere and said they will be in Canada later this month, at an event related to their Invictus Games. This journey is still expected to go ahead.
Diagnosis of King Charles Cancer
Prince Harry's brother, Prince William, has not yet commented publicly on the king's diagnosis.
Prince William is expected to assume some of his father's public duties during the king's absence, although the palace has confirmed that the king will continue to carry out official constitutional duties.
The prince was already due to return to public duties this week after stepping down following the Princess of Wales' abdominal surgery last month.
On Tuesday morning, the King's niece, Princess Beatrice, was seen arriving at Clarence House.
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