The royal “bullying” saga took an astonishing twist tonight as it emerged Prince William’s wife Kate could assist the probe into Harry’s wife Meghan.
Former aides are set to claim the Duchess of Cambridge witnessed Meghan’s “challenging behaviour”.
It was already revealed by several sources that Kate, 39, stood up for her own staff after they were berated.
But now she could be quizzed in a formal probe into alleged bullying by Duchess of Sussex Meghan.
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And even Camilla, the Duchess of Cornwall, might be called upon to assist as Palace officials have vowed to carry out a thorough investigation.
The developments came as the Palace – and the world – braced itself for Meghan and Harry’s no-holds-barred interview with Oprah Winfrey.
The explosive two-hour chat goes out in the US on Sunday night – 1am UK time – and is on ITV at 9pm tomorrow.
The Queen, as ever, has maintained dignity throughout – showing calm leadership despite the ongoing worry of husband Prince Philip being in hospital after a heart procedure.
Her Majesty ordered the investigation into Meghan’s alleged bullying.
Palace aides will consider testimony from at least 10 ex-staffers who reportedly accuse her of “emotional cruelty and manipulation”.
The double whammy of the bully probe and the Oprah interview has sent royal households into a spin.
In their interview, no subject is “off limits” as Meghan and Harry tell why they quit as working royals. Pregnant Meghan, 39, says she feels “liberated”.
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She, Harry and toddler son Archie now live in the millionaires playground of Montecito, California. They have signed £100million-plus deals with giants like Netflix and Spotify.
The Palace is braced for a raft of allegations after Meghan accused the royals of “perpetuating falsehoods”.
The duchess also discusses with Winfrey how the strain of living in the spotlight in Britain was “almost unsurvivable”.
It is also believed Meghan could confirm rumours of a rift with Kate by suggesting she failed to support her after she joined the family.
Afghanistan war veteran Harry has told Oprah his “biggest concern was history repeating itself” – referring to his mother Princess Diana, who felt hounded and isolated. She died in a Paris car crash in 1997, aged 36.
CBS reportedly paid Winfrey’s production outfit up to £7million for the interview. The chat host, 67, is worth £1.8billion, with stakes in cable channel OWN and Weight Watchers, for which she is brand ambassador.
ITV reportedly paid £1million for secondary rights to the interview, which will be screened in 68 countries.
It comes as aides revealed last week Meghan faced a bullying complaint during her time at Kensington Palace.
Former communications secretary Jason Knauf claimed, in 2018, Meghan drove two personal assistants out of the household and was undermining the confidence of a third staffer.
Two senior members of staff have claimed they were bullied when the Sussexes were sharing Kensington Palace staff with William and Kate.
Harry and Meghan later moved their offices to Buckingham Palace and relocated to Frogmore Cottage in the shadow of Windsor Castle.
Another former employee told The Times they had been “humiliated” by Meghan and claimed two members of staff had been bullied.
Previously, a source told of Kate standing up to Meghan for publicly rebuking staff.
A former staffer, speaking on the condition of anonymity, said: “That was just one of a catalogue of instances where Meghan spoke out of turn to palace staff in front of other people. These aren’t isolated instances and there are plenty of people who witnessed Meghan’s challenging behaviour.”
In another incident, Kate was reportedly “left sobbing” by Meghan’s “outspoken demands” around the fitting of Princess Charlotte’s bridesmaid dress.
Meghan denies bullying and the first she and Harry knew of the probe was when it appeared in the press.
A source close to them said: “This is a whole tit-for-tat scenario. If this was a private company, we’ve effectively already been fired and I’m not entirely sure what any process could be.”
A spokesman for the couple has said they are victims of a “calculated smear campaign based on misleading and harmful misinformation”.
Harry and Meghan’s lawyers said the allegations were part of a “wholly false narrative” from the Palace.
It is understood Meghan has long believed that Palace courtiers and even royals themselves have been briefing the press on negative stories about her.
To fully examine bullying claims, Meghan would have to be part of the process, but it is not clear what role, if any, she will play in proceedings.
The Palace said: “We are clearly very concerned about allegations following claims made by former staff of the Duke and Duchess of Sussex.
“Accordingly, our HR team will look into the circumstances outlined in the article. The royal household will not tolerate bullying or harassment in the workplace.”