“To repeat his sales success, Harry needed to give us something new. His decision not to is indicative of a less impetuous Prince, but one no nearer royal reconciliation. The paperback’s unchanged text is in line with the Duke’s pledge to move on from looking back.

“Widely criticised for indiscretions about his family, from brother William’s fiery temper (who can forget the dog bowl antics) and ‘alarming baldness’, to broadsides against his stepmother, Camilla, the ‘Other Woman’, Spare was deemed by many to have gone too far. But as tell-all books go, Harry could have divulged much more, and traditionally paperbacks are the ideal space to reboot the narrative and double down on the money.

“From the Sussexes’ Frogmore Cottage ‘eviction’ to a cold shoulder from the King during the Invictus 10th anniversary celebrations, Harry had the chance to press home his commercial advantage. But the Duke is playing a longer game. Too much whinging does his brand no favours, and with cancer impacting both his father and sister-in-law Kate, now is not the time to have another pop.”

And Tessa believes that the lack of new revelations says a lot about Harry’s relationship with the royals – and even hints at his regret for his previous actions. She added: “Those who suggest that this paperback release, with no additional material, is an olive branch, are sadly mistaken.

“New material can be conciliatory, Harry might have taken the lead and opened with a different prologue, fore-fronting his regret about how things turned out, and reiterating his good wishes for Kate and the King.

“That he has decided to stay shtum is indicative of the cold war which persists within the Royal Family. On the eve of his 40th birthday, there is little sign of a reconciliation. The uncomfortable stalemate persists. My hunch is that deep down Harry regrets some of what he has written, but like so many men, he is way too proud to admit it.”