King Charles has a deeply special bond with the Princess of Wales, often affectionately referring to her as his "darling daughter in law".

In addition to their personal relationship, Kate plays a crucial role in fostering a close bond between the King and his grandchildren, Prince George, Princess Charlotte and Prince Louis. In a recent Channel 5 documentary titled 'Kate: A Queen for the Future', a leading expert analysed how Kate is successfully performing this "important" task.

Leading Royal author Robert Jobson commented on this, stating: "Catherine is very important in the relationship between Charlotte, George, Louis and the King."

Jobson continued: "When William and The King are not necessarily on the best of terms, as sometimes fathers and sons are, it's always Catherine who will make sure that the King, if he wants to see his grandchildren, sees his grandchildren. And that's important.", reports OK!. This contrasts sharply with the relationship King Charles has with his other two grandchildren, Prince Archie and Princess Lilibet.

Following reports that the King was planning a trip to the US to visit his youngest son and his family, Meghan's father, Thomas Markle, has voiced his concerns for Archie and Lili's futures in a recent interview.

During a heartfelt conversation with New Zealand Woman's Weekly, Thomas expressed his concerns: "It struck me as very sad that Meghan and Harry's kids are being denied the right to know their cousins, who look like fantastic children, or take part in things like Trooping the Colour, which is their birth right."

"They are getting to the age where they will start to ask questions, as all kids do. I find myself wondering how Archie and Lilibet will feel in a few years' time when they realise all the things they have missed out on." Jennie Bond, a former BBC Royal correspondent, has echoed this sentiment with caution.

In a discussion with OK! she highlighted: "Children grow up and are innately curious about their heritage and background... and when your heritage is one of the most famous families in the world, it will undoubtedly seem rather odd and perhaps sad that you hardly know or remember them."

"Imagine Archie, aged 15, telling his friends, 'My grandpa is/was King! And my Uncle is/will be King too.' But he hardly knew or met them. How sad... and Meghan would have to bear the brunt of the responsibility for that."