The royal family has maintained its silence after Prince Harry accused Prince William's office of leaking negative stories about him and his wife Meghan to the media and that his older brother screamed at him during a family meeting.
The latest claims came in the final three episodes of the Duke and Duchess of Sussex's Netflix series Harry and Meghan, which details their departure from royal duties and subsequent falling out with the family.
Both Buckingham Palace and Kensington Palace indicated they would not be responding to the series or its contents following the release of the first three episodes last week.
Netflix said the communication offices of both King Charles III and William, the Prince of Wales, were contacted and given a right to reply to claims ahead of its release, which then turned into a war of words over whether the palaces or members of the royal family had been approached for comment.
Following the release of the final instalment on Thursday, King Charles received several diplomats at Buckingham Palace, before visiting members of the Jewish community in north London with Camilla, the Queen Consort, ahead of Chanukah.
Later in the day he went to Westminster Abbey alongside Camilla to attend a special Christmas carol service hosted by Catherine, the Princess of Wales.
Prince William arrived with Prince George and Princess Charlotte at the service, which is dedicated to Queen Elizabeth, who died in September.
The allegations Prince Harry levelled at William, who is heir to the throne, will cause the most headaches at the palaces, and shows a deterioration of what was once a close bond between the two brothers.
Prince Harry spoke of the "dirty game" played by the royal communications teams and the media, where they would "trade" damaging stories about one royal in exchange for a negative story about another family member being dropped.
"There's leaking but there's also planting of stories," he said.
"So if the comms (communications) team want to be able to remove a negative story about their principal, they will trade and give you something about someone else's principal."
Harry said he and his brother had agreed to stop the practice after seeing how it happened with their father's office during the breakdown in his marriage to their mother, the late Princess Diana – but he claims his brother went back on this agreement.
"I would far rather get destroyed in the press than play along with this game, or this business of trading," Harry said.
"To see my brother's office copy the very same thing that we promised the two of us would never ever do, that was heartbreaking."
He also said Prince William's office had put out a joint statement on behalf of both of them without his permission after a newspaper article was published that claimed William's bullying was one of the reasons he and Meghan had wanted to give up their royal titles.
"No one asked me permission to put my name into a statement like that," Harry said.
"Within four hours, they were happy to lie to protect my brother.
"And yet, for three years, they were never willing to tell the truth to protect us.
'It was terrifying to have my brother scream'
In one of the episodes Prince Harry also said his father, King Charles, lied during the same family meeting that his brother screamed at him while his grandmother, the late Queen Elizabeth, sat by and did nothing.
Harry said the incident occurred during a summit at the royal family's Sandringham residence in Norfolk in early 2020, shortly before he and Meghan announced they would be stepping back from royal duties.
"It was terrifying to have my brother scream and shout at me, and my father say things that just simply weren't true, and my grandmother quietly sit there and sort of take it all in," he said.
"But you have to understand that from the family's perspective, especially hers, there are ways of doing things and her ultimate mission, goal/responsibility, is the institution."
BBC royal correspondent Nicholas Witchell said the claims would be damaging for the royal family.
"It's not good at all," he said.
"But I think people will understand that this was a family at a moment of difficulty, when there were confusions and contra-stories on all sides, and I think that this is all played out now on a global stage."
Royal author Claudia Joseph said it was "tragic" how the relationship between the two brothers had changed so much.
"They used to be so close to each other … they were each other's best men," she told Reuters.
"But I think it is sad because I don't see how it can be easily repaired, especially when one brother is slinging insults at the other brother from across the Atlantic."
The filming of the series was completed in August this year, the month before the Queen's death.
