The Duke and Duchess of Sussex are to formally split from their joint charity with the Duke and Duchess of Cambridge and set up their own foundation.
Seen as the final step in the division of the couples’ public duties, Harry and Meghan are to break away from the Royal Foundation.
William and Kate will remain with the original charity, which will be renamed the Royal Foundation of the Duke and Duchess of Cambridge.
The Royal Foundation said the decision was made following the conclusion of a review into its structure.
It said both couples will continue to work together in the future, including on the Heads Together mental health campaign.
The decision was taken to “better align” their charitable activities, it said.
Sources denied there was a feud, saying it was “largely about preparing both couples for their future roles, which are obviously on divergent tracks”.
The statement on the Royal Foundation said: “Later this year the Royal Foundation will become the principal charitable and philanthropic vehicle for The Duke and Duchess of Cambridge.
“The Duke and Duchess of Sussex will establish their own new charitable foundation with transitional operating support from The Royal Foundation.”
It added: “These changes are designed to best complement the work and responsibilities of Their Royal Highnesses as they prepare for their future roles, and to better align their charitable activity with their new households.”
Harry and Meghan have already split from the Cambridges’ Kensington Palace household, setting up their own at Buckingham Palace in the spring, with a separate head of communications and SussexRoyal Instagram account.
Royal aides previously said the foursome were to remain joint patrons of the Royal Foundation.
The Sussexes, who have recently welcomed baby son Archie Mountbatten-Windsor, also moved from London’s Kensington Palace – home to William and Kate and their children – to live at Frogmore Cottage in Windsor.
William, Kate, Harry and Meghan’s joint Royal Foundation venture was intended to harness the star power of the four high-profile royals, but it lasted just 16 months after their first appearance as a foursome.
They were dubbed the Fab Four after taking to the stage together at the first – and so far only – Royal Foundation forum in London in February 2018.
The inaugural event was billed as an annual affair.
During the question-and-answer session, they were quizzed on whether there were disagreements, with William replying “Oh yes”, while Harry said “healthy disagreements”, adding that he could not remember if they had all been resolved as they “come so thick and fast”.
Meghan said: “Thank goodness (there are) such differing personalities and everyone’s very communicative because that’s how you can really see bigger change.”
The Royal Foundation was set up by William and Harry in 2009 to run all their charitable campaigns and ventures, and joined by Kate when she became Duchess of Cambridge in 2011.
Meghan joined in May 2018 after becoming an HRH, with the charity’s title later officially changing to The Royal Foundation of The Duke and Duchess of Cambridge and The Duke and Duchess of Sussex.
The body set up successful charity campaigns including Heads Together, the Endeavour Fund and projects with the Invictus Games.