Claims that Prince William and his staff briefed journalists over Prince Harry's mental health were cut from a documentary at the last minute over defamation fears, it is claimed.
Omid Scobie, official biographer of the Duke and Duchess of Sussex, had alleged that sources from inside Kensington Palace had spoken to newspapers about concerns for Harry's mental state.
The claims - which relate to the aftermath of an interview the prince gave to ITV reporter Tom Bradby in 2019 - were due to be aired in the programme 'Harry & William: What Went Wrong?'.
But the documentary was broadcast on Sunday night with the mental health allegation removed - although Mr Scobie's suggestion that some briefing had taken place was kept in.
According to the Daily Mail, Kensington Palace contacted the producers of the ITV show at the 11th hour over a "number" of details.
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One was a clear dismissal of Mr Scobie's suggestion that William had expressed a concern about his brother's mental health - which the makers were told would be defamatory.
And the paper said that, after "carefully considering" the request, the television channel chose to remove any related mentions to the topic.
It is thought that William would be extremely unhappy with any suggestion he would talk about mental health, due to his campaigning work.
In the interview with Mr Bradby, which followed the Sussexes' tour of South Africa, Harry made the comment that he and William "were on different paths".
His wife, Meghan Markle, also claimed that she was "surviving not thriving" and not receiving support from the royal family.
The interview made headlines around the world, and in the documentary Mr Scobie suggests that after that a campaign started by William’s aides - although he provided no evidence to back up his claim.
Mr Scobie - the author of 'Finding Freedom' - also said in the documentary that Ms Markle "immediately ruffled feathers" when she joined the firm.
He said: "She’s a woman well into her 30s, I think she’s proven to herself and the people she’s worked with up until that point that she knows what she’s doing.

"She was certainly not someone who was going to change herself just to please the people around her.
"I felt they also had to be reminded 'You’re not the stars of the show here. There is a hierarchy and you don’t come very high in it'."
William and Harry reunited last Thursday for the unveiling of a statue of their later mother, Princess Diana, on what would have been her 60th birthday.
The meeting - which took place at Kensington Palace - has been seen by some as a major step towards healing the warring brothers' storied rift.