
The extraordinary claim is made in Endgame, Scobie’s latest offering, which is published on Tuesday. “During the past 13 years, Diana cosplay has become a royal staple,” he writes. Omid Scobie, 42, alleges in his new book that a “huge amount of effort” went into channelling Diana, Princess of Wales and that both of her sons were consulted on such decisions.

The Duchess of Sussex and the Princess of Wales were encouraged to dress like their late mother-in-law so that some of her shine would “rub off on them”, the Sussexes’ biographer has claimed.