King Charles "punished" both Prince Harry and Prince Andrew "in one fell swoop", an American author has claimed.
Christopher Andersen, who wrote the book "The King: The Life of Charles III", said evicting the Duke and Duchess of Sussex from Frogmore Cottage and asking the Duke of York to leave Royal Lodge was a move made by the monarch to "economise" but at the same time "punish" Harry and Andrew.
Just a few weeks ago, a spokesperson for Harry and Meghan confirmed the pair have been asked to vacate their UK residence by the King.
According to reports, Frogmore Cottage has been offered to Andrew, who is said to be resisting the move as he prefers his 30-room Windsor mansion, where he has lived since 2004.
Harry and Meghan's eviction reportedly began on January 11 - a day after Harry's memoir Spare was published.
But according to Mr Andersen, there are more significant reasons behind the eviction, as he told Fox News: "Booting the Sussexes out of Frogmore Cottage was not merely an act of revenge for what Harry wrote in 'Spare' about Camilla, and it was not merely a cost-cutting move.
"In one fell swoop, the King managed to look as if he was economising while at the same time punishing both Harry and Andrew — a royal trifecta."
The Duke and Duchess of Sussex are said to be "stunned" by the King's decision and two other royals have reportedly been left "appalled", according to royal biographer Omid Scobie.
The author, who co-wrote the biography of Harry and Meghan, "Finding Freedom", said the King's decision came after Harry released his controversial memoir Spare.
He claimed that the couple was told the property was needed for "someone else" and that relations between Harry and Meghan and the rest of the Firm were at "an all-time low".
Writing for Yahoo, he explained: "It's news, sources tell me, that has left Harry and Meghan stunned, and at least two members of the Royal Family 'appalled'."
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Earlier this month, it emerged that Harry and Meghan have been invited to the monarch's coronation on May 6 - but the Sussexes have not yet confirmed if they will attend.
A spokesperson said: "I can confirm The Duke has recently received email correspondence from His Majesty's office regarding the coronation.
"An immediate decision on whether The Duke and Duchess will attend will not be disclosed by us at this time."