A royal biographer has warned if Prince William and Harry do not fix their animosity it will be a “shock” similar to the death of Mother Diana that will change the monarchy forever.

Robert Lacey, who has just finished a new book about the brothers, said the split between them was “worse than anyone would think”.

Battle Of Brothers tears fissures in the Dukes’ relationship, with the former journalist and historian claiming the breakup goes back more than before than many believe.

Mr. Lacey – who wrote what would be considered the Queen’s definitive biography in 1977 – was welcomed by the company with open arms.

Diana, Princess of Wales, died in a car accident in 1997

Palace officials cooperated with his work and he was even invited to have tea with senior court officials.

Moreover, his aristocratic wife was a maid of honor at the Queen’s coronation.

But when some of the more difficult chapters’ guides were sent to the palace for his latest work, as he had in previous books, they were returned without opening, indicating that the royal family did not want to know.

The author believes that the royal family misjudged Megan

Lacy believes that the property system has conspired to fan the flames of discontent between William and Harry, rather than trying to find a compromise.

The author said, “Some say, ‘Oh, it doesn’t matter. It will explode ” The Daily Mail.

But that is not what historians will say in ten years.

Lacey said the monarchy had returned its chapter guides without opening them

“If this breach between the two brothers is not addressed in some way, it will stand with the abdication crisis and the death of Diana as one of the traumas that changed the monarchy.

“There is a time to change things in a positive direction, but at the moment the palace is not working in that direction.”

Lacey also drew parallels between Diana, the “anti-royal” Princess of Wales, who was tragically killed in a car accident in 1997, with Harry’s wife. Megan Markle.

William and Harry with Diana in 1995

He believes the company was naive in how it dealt with the ex-Hollywood actress – it’s “never going to be a routine monarchy.”

The author claims that Harry found refuge in Megan, after “realizing that there was something rotten in the heart of the property.”

“Megan walks her own way through the minefields, as Diana did. Figurative minefields,” he added.

Harry and Meghan announced in January that they would step down from their position as a member of the royal family, before moving to America in March with the goal of financial independence.