A royal pundit has issued a strong warning to Prince Harry and Meghan Markle, saying they should stop “knocking” the Firm.

The Duke and Duchess of Cambridge’s relationship with the Royal Family has apparently been tense for years, and it reached a head last year during an appearance with Oprah Winfrey in which the couple made several claims against the Firm.

The relationship has been labelled as “destructive” by Richard Fitzwilliams.

“Don’t keep bashing the British Royal Family,” he warned. “Whatever future they desire, they’re utterly unexpected in my opinion.”

“Don’t keep knocking your family, which it is. They have a very destructive side, and Oprah showed that very clearly.”