There’s no going back.

Prince Harry will reportedly never be a part-time royal — despite recently reuniting with his father, King Charles III, in the UK.

“The King is a forgiving man but has been absolutely clear in upholding his late mother’s decision that there cannot be ‘half-in, half-out’ members of the working royal family,” a royal source told the Daily Mail.

A royal insider also blasted sources that said Harry’s four-day trip to the UK could be a new working model for him, in which he still gets to take on royal duties while being based in the US with his wife, Meghan Markle, and their two children — Archie, 6, and Lilibet, 4.

“Whoever is behind [the Sussexes] seems to have mistaken a brief tea and a slice of cake for the Treaty of Versailles,” the insider said.

Another royal source shared, “These syrupy briefings from supposed Sussex sources are precisely why the King and Royal family are so hesitant to embark on any road to rapprochement. If the intention is to encourage a rebuilding of trust and relationships, they serve the precise opposite effect.”

The insider added that President Donald Trump’s visit to the UK last week, in which he and First Lady Melania Trump happily met with Prince William and Kate Middleton, was a show of strength for Charles and William.

“As last week’s State Visit clearly demonstrated, the power and impact of the modern monarchy lies in the unshakeable bond between The King and the Prince of Wales, supported by other working members of the family,” the source claimed.

Page Six has reached out to reps for Harry and Buckingham Palace but did not immediately hear back.

Harry, 41, expressed interest in moving back to the UK with his family, according to Joss Stone, who spoke with him at London’s WellChild Awards during his visit.

The singer told Hello! magazine that the father of two asked her about her own recent move back to the UK.

“He was saying how wonderful the schools are here and how important community is for children,” the Stone, 38, recalled. “It was nice to share that with him because it’s exactly why we felt drawn to come back.”

A spokesperson for the Duke of Sussex told Page Six that he very much enjoyed his recent visit back to his home country.

“He’s obviously loved being back in the UK, catching up with old friends, colleagues, and just generally being able to support the incredible work of the causes that mean so much to him,” the spokesperson told us.

As for his reunion with his father, Page Six was told that the two had “private tea” for just shy of an hour, during which Harry showed his dad, 76, photos and videos of his kids.

Harry and Markle, 44, announced they were stepping back as senior members of the royal family back in January 2020. Since then, they’ve been living in Montecito, Calif.