King Charles forced Prince William to sign ‘waiver’ over major disagreement, new book claims

King Charles made Prince William sign a waiver after he refused to go along with his wishes, a new book claims.

While it's highly speculated that King Charles and his second son Harry have had their rocky moments, it apparently also hasn't been plain sailing for him and the future heir to the throne.

Prince William and his father reportedly had a clash, which consisted of the King asking him to stop doing something he had always done.

And the run-in eventually led to the Prince having to sign an official 'waver' taking accountability for his actions if anything tragic were to happen.

Prince William reportedly refused to follow the King's wishes. (Anwar Hussein/WireImage)

According to Rob Jobson's new biography of the future Queen, Kate Middleton, the row happened after he received his cancer diagnosis.

According to the book, he understood that the future of the monarchy was heavily in his hands.

But upon requesting his first-born to follow his wishes, William refused.

King Charles had serious concerns about experienced pilot William's decision to fly his young family around the country in a helicopter.

His reasoning was that if anything fatal happened while they were all in the sky, it would dramatically change the trajectory of the Royal Family.

In a passage published by Mail Online, Rob wrote: "An experienced pilot, William had upset the late Queen when he defied her request not to pilot his family the 115 miles from Kensington Palace to Anmer Hall, their home in Norfolk.

"The Queen, haunted by the 1967 crash that killed the Captain of the Queen's Flight (although no royals were on board), 'did not hold back', one aide said.

"After being diagnosed with ­cancer, King Charles - perhaps reminded of his own mortality - echoed his late mother’s concerns.

William is the future heir to the throne. (Karwai Tang/WireImage)

"And when William refused to stop flying with his family, Charles insisted he sign a formal ­document, acknowledging the risks involved and taking full responsibility for his actions.

"It would be scant consolation, of course, for an unspeakable tragedy, let alone the prospect of King Harry and Queen Meghan…"

The royal correspondent's new book focuses on the life of Kate Middleton, from her early uni days in the spotlight, to what it feels like to be the Queen in waiting.

The biography description reads: "Her self-deprecation, willingness to laugh at herself, solid work ethic - along with her husband, William, warmth, and accessibility - this Royal Family's dynamic duo have become the most popular members of the Royal Family.

"But it's not come without its fair share of commentary and scandal, particularly with recent revelations on the relationship of the 'Fab Four' with Prince Harry and Meghan Markle as well as her own health scares."