As quoted in a passage published by Mail Online, Rob Jobson 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.”

“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 latest book explores Kate Middleton’s journey, from her early university years under public scrutiny to her role as the future queen.

According to the biography’s description, “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.”