Prince Harry's 'broken promise' to King Charles that's set to send sparks flying

Prince Harry's packed autumn schedule has been revealed - and it could be a recipe for more drama with the Palace .

The Duke's return to the UK with his wife Meghan Markle and two children, Prince Archie and Princess Lilibet , has sent shockwaves in royal circles. While King Charles is understood to be delighted to have the opportunity to spend more time with his grandchildren, suspicions around the couple's motives are rife.

The Sussex's move back to the UK last month appeared to be incredibly sudden, with the King said to have only been given a few days notice. For Harry and Meghan, the relocation apears to have been long discussed.

But royal watchers noticed a potential change in tide long before the big comeback. Last summer, representatives from both camps met for a secret meeting in London in a bid to improve communications which had long been strained - or non-existent.

While no official statement was issued, reports surfaced that Harry had offered to share his official diary engagements with the Royal Family in a move to further defrost tensions.

A month prior, the Duke's trip to the African country of Angola apparently sparked frustration, with images of Harry retracing his late mother Princess Diana 's footsteps through a minefield knocking photos of Queen Camilla 's 78th birthday portrait off the front pages.

At the meeting, Harry's team reportedly offered a diary-sharing arrangement to stop a similar situation happening again, with the deal is even believed to have been extend to Prince William 's court at Kensington Palace.

But now it seems as though cracks have formed in the alleged arrangement. Reports at the weekend suggested that "there is no diary co-ordination with Team Sussex," meaning awkward clashes could very well still happen.

Experts warn that Harry and Meghan have now found themselves operating alongside the Royal Family with what increasingly looks like a second royal court - with competing announcements, public appearances and briefing battles.

The tense dynamic came into sharp focus last week when a letter on behalf of the King was issued to senior officials across the country, confirming that the Sussexes are 'private citizens' who cannot use their HRH titles.

Harry and Meghan's team hit back at the letter, saying they were 'surprised' at the public statement from the Palace and were 'caught off guard'. Then, an extraordinary briefing made it clear that the Sussexes' preference is to be known as 'public figures' rather than private citizens as they want their royal status to be recognised.

Proving just how difficult that "private" reality is, Prince Archie, seven, and Princess Lilibet, five were abruptly pulled from their new British school just two days into the term.

A family spokesman confirmed the move was prompted by security vulnerabilities during the school run.

"It’s a real shame, because they absolutely adored the school, the kids and their parents," the spokesman told HELLO! . "It was perfect for them in every way and the children really enjoyed their time there.