King and Camilla will now enjoy the peace and 'sit in quiet and read a book' in Sandringham

The Duke of Sussex had a 45-minute chat with his father before the monarch headed off to Sandringham with Queen Camilla.

Despite the prospect of a rekindling being talked up as a result of the meeting, Levin says William and Camilla will be more than happy on their own.

“When he goes to a place he loves, where there is peace, where there is no pressure on him, he can relax and walk about”, she said.

“What he and Camilla like to do best is sit in a room with a fire, reading a book.

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“They don’t need to talk to each other. They just need the peace.”

Dressed in a suit and tie and smart overcoat, the King waved and smiled at well-wishers, with Camilla at his side in the back of the car, as they left Clarence House just after 3.30pm yesterday.

A helicopter was seen flying from Buckingham Palace just 10 minutes later.

The King, 75, has postponed all public-facing duties, but is continuing with behind-the-scenes work on his red boxes of state papers.

Harry’s black Range Rover was pictured arriving at a private terminal at Los Angeles International Airport before he boarded a flight for London, and he was later seen at Clarence House.

He last appeared alongside the Windsors at the King’s Coronation in May, but hurried home immediately afterward to mark his son Prince Archie’s fourth birthday.

While Charles and Harry were said to still speak, William has reportedly not been in contact with his brother for an extended period of time.

William is returning to official duties this week, beginning with an investiture on Wednesday.

The heir to the throne is expected to also be undertaking some duties on his father’s behalf, but Counsellors of State, who are appointed temporarily when a monarch cannot fulfil their duties as head of state, are not expected to be needed.

Meanwhile, the Princess Royal held the fort on the royal engagements front, carrying out an investiture on behalf of the King at Windsor Castle on Tuesday.

Charles personally called both Harry and William, as well as his siblings Anne, the Duke of York and the Duke of Edinburgh, to give them the news before it was publicly announced to the nation by the Palace at 6pm on Monday.