Royal Biographer Angela Levin has revealed the royal protocols that King Charles broke in his first year on the throne, and how his mother, the late Queen, would be "shocked" by his decision.
This follows the King's monumental return to royal duties after announcing his cancer diagnosis earlier this year.
The monarch is still receiving cancer treatment, but doctors have allowed the King to return to engagements following a "positive reaction".
In his first outing with Queen Camilla, the King visited University College Hospital Macmillan Cancer Centre in London, where he opened up about his own cancer diagnosis, and how being diagnosed was "awful" and a "shock".
Angela Levin says King Charles has 'broken protocol' which would 'shock' the late Queen
GB News / PA
Discussing the King's first year on the throne on the anniversary of his Coronation, Angela Levin told GB News that the monarch is "even more caring and accessible" to the British public.
Levin revealed that the King and Queen believed "nobody would be there" to support them following the death of Queen Elizabeth II, and were surprised to find crowds of fans outside Buckingham Palace.
Levin told hosts Ellie Costello and Stephen Dixon: "I think it's been a long and a short year, somehow. But the year where it all began when he became much more easy to be with people, was actually after the death of the late Queen, and they came back to Buckingham Palace.
"And I know they both thought there would be nobody there, or people would be shouting at them because of the loss."
King Charles gave young children gift bags outside the cancer centre during his visit
PA
Levin claimed that the King's cancer diagnosis has also helped him create a "very different image" of himself as a monarch.
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Levin explained: "They've really become very, very accessible and very close. And I think the cancer has made the King even more wanting to talk to his people and caring about them."
Stephen praised the King's visit to the London cancer centre, and said his smiles looked "very genuine".
He added: "One thing that sticks in my mind, he just grabs someone's hand and gives it a squeeze. And that to me is so intimate and personal. And I really thought it was a lovely thing to see."
Levin replied: "Also the fact that he revealed to that particular person that it's awful when they tell you that you've got cancer, he was so understanding of what they felt, and you could see the conversation was very easy."
Angela Levin says King Charles is now 'even more caring and accessible' to the British public
GB News
Levin also noted a significant decision made by the King at the end of his visit that would "shock" the late Queen.
She revealed: "It was very interesting to see that he's also broken a few things that the Queen would be quite shocked about. And one of these was outside, there were two young children."
"They'd both had cancer and they gave a posy to him and a posy to Queen Camilla, and he came out with a big bag of presents, and he passed it to them, and he wanted to give them something in return."
Traditionally, royal protocol dictates that royals are to only receive gifts from the public, not give them.
Levin continued: "And that stuck with me because I thought that is an amazing thing to do. Because they will keep whatever's in it. I was dying to see if maybe they would open it up, but they didn't. But what a delightful thing to do, because you keep that forever."