Prince Harry and Prince William’s relationship could now be beyond repair following the publication of Finding Freedom, a royal expert has claimed.

The royal brothers’ widely publicised “feud” was one of the focusses of the explosive biography being serialised in the Sunday Times.

Harry himself admitted a break-down in his relationship with the Duke of Cambridge in a now-infamous ITV documentary last year.

But, according to Vanity Fair’s royal correspondent Katie Nicholl, the duo were starting to mend bridges in the build-up to the book’s release.

In a clip Daily Star Online has obtained from upcoming Channel 5 documentary Meghan & Harry: The New Revelations, she said: “The irony about this book, in many ways, is that the brothers were just getting to a stage in their relationship where they were on a more even keel.

Prince Harry and William
Prince Harry and William's relationship is 'beyond repair' after Finding Freedom, a royal expert claims

“I was told that communication had resumed between the brothers.

“We don’t know whether they’ve spoken in light of the excerpts from this book.

“But one can only imagine this has done nothing to improve relations that were strained in the beginning and at this stage must seem pretty beyond repair.”

The biography, which is written by Omid Scobie and Carolyn Durand, claims that Harry was “p***ed off” after William allegedly warned him not to be “blindsided by lust”.

It is also alleged that Harry branded his brother “snobbish” after William referred to wife Meghan Markle as “this girl”.

The Duke and Duchess of Sussex have said they did not contribute to the book.

A spokesman for the Sussexes, who now live in California, said: “The Duke and Duchess of Sussex were not interviewed and did not contribute to Finding Freedom.

“This book is based on the authors' own experiences as members of the royal press corps and their own independent reporting.”

A spokesperson for the Duke of Cambridge declined to comment when approached by Daily Star Online in relation to Katie's allegations.

This site has also contacted Prince Harry's representative for comment.

Meghan & Harry: The New Revelations airs on Channel 5 tonight at 9pm.