The one thing Meghan Markle wouldn't want to do if she returns to the UK

doesn't seem set to return to the UK any time soon - though if she and Prince Harry did, it could be on a part-time basis.

The Duchess of Sussex hasn't come back often since moving to California with the Duke and having two children, Prince Archie and Princess Lilibet.

But if she did, whether on a temporary basis or for any royal engagements, she may be in for some awkward encounters.

According to a royal author, there is one thing in particular Meghan would be reluctant to do and it involves her relationship with Princess Kate which has been rocky since before the actress left the Royal Family.

Andrew Morton, who collaborated with Diana, Princess of Wales, on his 1992 book Diana: Her True Story, ruled out a move back to the UK because of their fraught relationship.

Asked whether he thought the Sussexes would ever come back to Britain, Andrew told Sky News' Sunday Morning With Trevor Phillips last year: "What, and have Meghan Markle curtseying to Kate Middleton? I don't think so. I don't see that as a runner.

"They've got their own lives in California." Royal Highnesses bow and curtsey only to majesties, so Meghan - The Duchess of Sussex - would only have to do so to Kate only when William ascends to the throne and makes the Princess of Wales, Queen.

explored Meghan and Kate's fractious relationship in his autobiography, Spare, recounting how Kate had demanded an apology from Meghan who had said the Princess of Wales had "baby brain" due to her hormones while pregnant with Prince Louis.

Since the Duke and Duchess of Sussex left their royal duties, the couple have faced some frostiness from the rest of the family which does not look set to ease.

In fact, if the couple do return - particularly to celebrate the Invictus Games next year - they may only be allowed to see three royals, and only one of them is a senior member.

Meghan may be limited to meeting with just King Charles and Beatrice and Eugenie, with a reunion with the Prince and Princess of Wales unlikely.