However, the Mail’s Diary Editor, Richard Eden, claimed courtiers were furious over Harry’s latest claim and dismissed it, branding it “tasteless”.

The courtier said: “There is something distinctly ‘off’ about it [Harry’s claim].

“We’ll never know what was said between grandson and grandmother. What we do know is that we will only ever know one side of the story.”

Mr Eden added that the duke’s latest attempt to use the memory of the Queen for his own benefit is “likely to be viewed by many as distasteful – particularly given his disruptive behaviour in her final years.”

He noted the couple’s bombshell interview with Oprah Winfrey in March 2021 just as Elizabeth’s husband, the late Prince Philip, aged 99 at the time, saw his health deteriorate and was admitted to hospital, dying four weeks later.

He also pinpointed that Harry announced the release of his explosive memoir, Spare, just two months before Queen Elizabeth died in September 2022.

Mr Eden criticised the duke for his behaviour, saying: “Shame on Harry for now trying to use the memory of a grandmother he did so much to hurt in her final years.”