Andrew Mountbatten Windsor, 65, was stripped of his Princedom and effectively evicted from his 30-room home in a shock move by his older brother King Charles III, 76, on Thursday.
As heir to the throne, Prince William made it clear that he backed his father completely.
He and Kate were also apparently concerned, having made it known that Windsor will remain their home after their accession, that the estate would be ‘forever tainted’ if Andrew stayed there.
William’s distaste for his uncle is said to have began after Andrew made ‘rude’ remarks about wife Kate in the past, a royal biography has claimed.
Andrew Lownie, in his book Entitled: The Rise and Fall of the Yorks and first serialised in the Mail, quotes a source as saying Andrew had been disrespectful towards the now-Princess of Wales.
The exact nature of the remarks is unknown.
The source is quoted as saying: ‘He [William] also loathes Sarah, Andrew’s ex-wife, and can’t wait for the day when his father throws them both out.
‘If Charles doesn’t, I guarantee you the first thing William does when he eventually becomes king is to get them evicted.’
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Andrew Mountbatten Windsor is pictured with the Prince and Princess of Wales at the Duchess of Kent’s funeral in September – William was said to be ‘furious’ at his uncle’s unexpected appearance
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William and Kate appear at the opposite end of the Buckingham Palace balcony to Andrew in 2011
It is no secret that the heir to the throne has become increasingly exasperated with his uncle in recent years after a series of scandals that have damaged the royal family’s reputation.
Most notably is his friendship with Epstein, which continued after the billionaire had been convicted of sex crimes against a young girl and saw trafficking victim Virginia Giuffre allege she had been forced to have sex with the royal on three occasions.
Recent revelations, including friendly emails from Andrew and Sarah to Epstein after they had claimed to have broken off relations, plus details of how the paedophile funded Sarah’s lifestyle amid spiralling debts, have even created tensions with their daughters.
In his book, Lownie adds that William was left furious after Andrew and Sarah turned up to the Duchess of Kent’s funeral in September, which they had not been expected to attend.
Lownie wrote: ‘William, meanwhile, was ‘furious’ at being ambushed in this way, according to friends.
‘He has been at pains to distance himself from his uncle and not be photographed with him.
‘He believes his father has not dealt with him with sufficient firmness and that Andrew – and Sarah Ferguson – have done much to undermine the good work of other members of the Royal Family.’
Before Andrew was stripped of his royal titles, William and Kate backed the King, saying they also wanted him kicked out of Windsor.
William, 43, was said to have been pushing for the eviction of Andrew and his ex-wife from Royal Lodge, in Windsor, for years, and was reportedly frustrated at it falling into disrepair in recent months.
The former Duke of York and his ex-wife Sarah Ferguson now both face moving to new homes.
While Andrew is destined for the Sandringham Estate in Norfolk, Sarah will have to make her own arrangements and is even rumoured to be considering moving abroad, after weeks of scandal damaged the relationship between the former couple and their children.
Beatrice and Eugenie are to retain their princess titles and membership of the House of York, but are said to be deeply disappointed in their parents, although simultaneously very concerned about their father’s mental wellbeing.
Meanwhile, William’s estranged brother Harry, Duke of Sussex, has a similarly poor relationship with his uncle, the book also claimed.
He is said to have told his brother he ‘hated’ Andrew, with a source saying Harry had previously called him an ‘a******’ and a ‘twit’.
It comes as it was revealed last night that the King was ‘gravely concerned’ that the future of the monarchy was at stake unless he acted decisively to banish his beleaguered brother.
This was despite concerns from family members about the impact this could have on Andrew, who is said to have become all but a recluse in Royal Lodge in recent weeks.
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The King was ‘gravely concerned’ that the future of the monarchy was at stake unless he acted decisively to banish his beleaguered brother (pictured with his ex-wife Sarah Ferguson at Ascot in 2019)