Prince William and Kate Middleton "are worried that anything they say" to Prince Harry and Meghan Markle could be entirely leaked to the media, an expert has claimed. 

Veteran royal expert and author Katie Nicholl spoke to Entertainment Tonight regarding the little time the royal brothers and their wives spent together during the Queen's Platinum Jubilee celebrations. "I think that does signal not just a busy timetable on the part of the Cambridges, but perhaps also a bit of a lack of trust."

"I do know that William and Kate are worried that anything they might say or do with the fact that it could end up being leaked to the media," Nicholl continued. "So, I think in the case of really having to prove now that they can be trusted."

"If there's going to be any chance of moving on, repairing relationships and really trying to heal some pretty deep wounds, then I think Harry and Meghan are going to have to respect the wishes of the royals," Nicholl added. "I think Harry and Meghan are absolutely going to have to respect the wishes of (Queen Elizabeth II) and (Prince Charles) and that these meetings remain private."

The Duke and Duchess of Sussex met with the Queen and Prince Charles during their visit to the United Kingdom for the Platinum Jubilee. Lilibet met her great-grandmother, the Queen, and her grandfather Charles for the first time.

The Sussexes remain busy in the United States. They are said to be filming a reality documentary series with Netflix. Meanwhile, Harry's upcoming tell-all memoir will reportedly be out by the end of the year. 

According to Harry, the memoir will reveal a "wholly truthful" story of his life. The book is also believed to further shatter the relationship between Harry and the rest of the British Royals Family members, which has been stained since Harry and Meghan withdrew from their senior roles in 2020. 

Royal commentator Angela Levin talked about the memoir, claiming that Harry is so "bitter" about his relationship with his family that he will not hold back. She said in The Mail's Palace Confidential podcast, "I think he really wants to show his power over William because he was fed up with being the spare rather than the heir.

"I think he's got a lot of poison running in his blood now about what he feels about his background and his family. And I think he doesn't mind if he hurts people because he feels that he has been hurt by them."

Prince William and Kate Middleton Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge during a visit to Abaco on March 26, 2022 in Great Abaco, Bahamas. Abaco was dramatically hit by Hurricane Dorian which saw winds of up to 185mph and left devastation in its wake. Their Royal Highnesses are learning about the impact of the hurricane and see how communities are still being rebuilt more than two years on. Photo by Samir Hussein - Pool/WireImage