Prince William's decision on Archie and Lilibet could impact Eugenie and Beatrice

Sources suggest Prince William, 43, may restrict HRH usage to working royals only as a result, which would also impact family members like Princesses Beatrice and Eugenie.

The York sisters have HRH titles but do not officially carry out engagements on behalf of the monarch.

If enacted, this rule would align with King Charles's belief in a slimmed-down monarchy. GB News has contacted Kensington Palace for comment.

Speaking to the Mail, a courtier said: "Why on earth are Harry and Meghan so bothered about all these titles? They are meant to be pursuing a new life in America."

The decision follows revelations that the Duke and Duchess of Sussex applied for British passports for Archie and Lilibet with their HRH titles included.

The passport application is thought to have prompted the heir to the throne to take action.

When Archie was born in 2019, Harry and Meghan chose not to use a title for their son. He could have been the Earl of Dumbarton or Lord Archie Mountbatten-Windsor, but was simply Master Archie.

However, the couple's stance shifted after relocating to America. In their 2021 Oprah Winfrey interview, Meghan claimed the Palace had denied Archie the title of "prince" against protocol.

"It's not their right to take away [his title]," Meghan told Winfrey.

Under rules established by George V in 1917, Archie and Lilibet became entitled to prince and princess titles when Charles became King in 2022. The Sussexes first used "Princess Lilibet" publicly after her 2023 California christening.

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A source close to the Duke and Duchess informed The Guardian this month that the couple had requested HRH be printed on their children's British passports.

The source claimed this was "so that when they grow older, they can decide for themselves whether they want to become working royals, or stay out of public life."

The 2020 Buckingham Palace statement specified: "The Sussexes will not use their HRH titles as they are no longer working members of the Royal Family."

Meghan's representatives have stated she does not use the HRH title for any public or commercial purposes, and is therefore not in breach of the Sandringham Summit agreement.