London, UK - Is that one of the reasons for his return to Britain? Prince Harry is apparently planning a documentary about his late mother Diana. His brother, Prince William, is said to be far from thrilled about it.

Since the Sussexes moved back to the United Kingdom, speculation about the reasons behind the surprising decision continues.

As the British Daily Mail reported, Harry is said to have returned to his former home partly because of a planned film project.

Nearly 30 years after Lady Diana’s tragic death, her youngest son is reportedly working on a documentary about his late mother and has already spoken with people from her inner circle, royal expert Richard Kay claimed.

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'I am told that one of the reasons Harry's here is to make a television film, his own film, about his mother. I know he has been reaching out to his friends and others who knew her, asking them to contribute," the insider revealed, citing, among other things, a recent visit by the Duke of Sussex to Diana’s family.

In his view, the project will keep the double father occupied for the next twelve months.

Within the royal family, Harry’s plans could spark fresh controversy.

In particular, his brother William is said to be far from enthusiastic about the idea of a return to England—on the contrary, the British heir apparent dislikes that his younger brother is repeatedly linked publicly to their mother’s legacy, sources say.

he was the mother of two boys. William is just as much his mother's son as Harry is," emphasized the royal expert. William’s irritation stems from his brother’s continual attempts to claim Diana’s legacy for himself, Kay added.

In 2017, on the 20th anniversary of their mother’s death, the brothers showed they could still work together: William and Harry appeared together in a documentary to honor Diana’s memory.

Nearly a decade later, such collaboration seems unthinkable – the princes are now more estranged than ever.