There were two other important factors at home that helped the Prince of Wales support his wife and children – his in-laws, the Middletons; and living in Windsor.

When the Princess made her public announcement about her diagnosis, the message was posted on royal social media accounts, and one of the first people to publicly respond was her brother James.

Alongside a childhood holiday photo of himself and his sister, he wrote: “Over the years, we have climbed many mountains together. As a family, we will climb this one with you too.”

Together with his sister Pippa and parents Carole and Michael, the family became key to keeping life as normal as possible for the royal children. People living locally reported seeing Carole Middleton, who lives 30 miles away in Bucklebury, Berkshire, regularly driving in and out of Windsor Castle.

And when the Princess’s surgery prevented her from driving, it was her mother who often drove her daughter to school to collect the three children.

The decision to move from Kensington Palace to Windsor Castle in 2022 also proved timely.

“Windsor has been a sanctuary. It has provided the protection and privacy the family needed this year,” said a friend.