Prince Harry even went so far as to claim that the court case was a "good old-fashioned establishment stitch-up," suggesting that it used security as a way to trap people within the Royal Household.

However, Dr Persaud believed Harry’s public airing of their grievances was possibly an emotional ploy to encourage the King to contact him after all other avenues of communication had been cut off.

He also believed the Prince appeared so convinced of his own argument - that he had an entitlement to security for himself and his family - that he could not see past it or let it go.

Dr Persaud wrote: "I can only hope Prince Harry is being well-advised. He appears to be in difficulty and, I would suggest respectfully, needs help to move on and really start a process of rapprochement with his family.

"Sadly, this is unlikely to happen, though the prism of another angry media interview showing his apparently trapped mindset."

One royal source told ITV News the late Queen would have been "truly horrified" at his comments in the interview.

Prince Harry also told the BBC he doesn't "know how much longer he [King Charles] has left”, suggesting the King is in seriously ill-health.

His comments were slammed as "poor taste" by a royal source who spoke to the Telegraph, with another adding: “The King is a kind man with a warm heart and quite enough on his plate to deal with, without all this from his son."