Prince Harry could 'mend relationship' with King Charles on one condition - expert

could "mend his relationship" with , royal expert and author Robert Hardman has suggested.

The King, who will celebrate his 76th birthday later this month, is reportedly keen to rebuild his relationship with his estranged son - but only once he knows Harry, 40, will stop airing his grievances, it has been alleged.

The claim was made by Daily Mail contributor Robert Hardman, who is the author of 'The Making of a King: King Charles III and The Modern Monarchy'.

Speaking to , Mr Hardman also said: "People keep asking, 'Could Harry come back into royal life? Could he do this? Could he do that?' You never say never with the royals. But I think a good starting point is to get back to a situation where it's perfectly normal for Harry to visit the UK and see his father with [his] kids, and Meghan [Markle], too, if she wants to."

"We... sense that [Meghan] doesn't like coming to Britain at all. But if you get to a situation where they come over now and then to see granddad - once it happens once or twice, and it becomes normalised, they can start building from there.

"It's going to be a slow burn, yes, but no, the door is not slammed shut."

The publication also alleged that Harry has been feeling the "birthday blues" since his 40th birthday back in September.

Royal expert Neil Sean told Fox News Digital: "Harry was keen to get some opinion on exactly where he stands within the UK market and admitted to my source that he had birthday blues about hitting 40, but also added that he was excited about the next decade."

The source described his reasoning as being "basically nobody knows where life is taking them, right?'"

They also claimed that Harry, who has travelled home to Britain multiple times since stepping back as senior working royal in 2020, "misses the UK on a day-to-day basis."

Mr Sean alleged that Harry would be keen on coming back to the UK on a full-time basis - but claimed that two special people would prevent this from taking place.

Referring to the Duke and Duchess of Sussex's children - Prince Archie, five, and Princess Lilibet, three - he claimed that "once you have children, your life is no longer your own."

Harry and Meghan moved to the US in 2020 with Archie, who was less than a year-old at the time. They then welcomed their daughter in June 2021 after they were already settled in California.