Buckingham Palace will be watching with trepidation, given the prince’s book Spare was full of attacks on his father and brother. What Harry says may even influence whether he and Meghan receive an invitation to the coronation, one expert believes.

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Royal biographer Phil Dampier said: 'The King and Prince William would have hoped that Harry calmed down and stopped giving interviews after the publicity interviews he did for Spare but it seems not.

‘In fact he may feel he has nothing to lose after bring booted out of Frogmore Cottage. So sadly, with just nine weeks to the coronation, relations between him and his family seem to be getting worse, not better'.