Princess Kate and Meghan were encouraged into “Diana cosplay”, a royal biographer has claimed.

Journalist Omid Scobie has a new book which is set to lift the lid on the Royal Family – and his latest revelation is that The Duchess of Sussex and the Princess of Wales were encouraged to dress like their late mother-in-law Princess Diana.

He writes: “During the past thirteen years, Diana cosplay has become a royal staple.”

Mr Scobie also says that “huge amount of effort” went into the practice of Princess Kate and Meghan chanelling Diana in the hope that her shine would “rub off on them”.

The claim is made in Endgame, Scobie’s new book, which will be published on Tuesday.

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