Meghan Markle and Prince Harry's "silence" on the publication of the bombshell biography "Finding Freedom" is a sign that they may approve of its contents, according to royal correspondents.

The royal couple are not shy about taking legal action when they deem it necessary and are currently locked in a High Court battle against Associated Newspapers Limited for five stories published in 2018.

Royal correspondents Chris Ship and Lizzie Robinson speculated that close pals of Meghan and Harry may have even provided a helping hand by being interviewed by the book's authors.

Talking on ITV's Royal Rota today, Lizzie said: "I think that we know that in recent months that Harry and Meghan, since they have been released from their roles, when they have a problem with something, they say something now.

Prince Harry and Meghan Markle arrive in Trafalgar Square, London, in 2018

“And they have the freedom to do that, and the silence is quite telling really from them.”

Chris described the biography as a "Sussex Bible" and speculated that sources quite close to Harry and Meghan were probably involved.

Lizzie said: "There is a lot of detail in this book, from the extracts we've seen, a lot of personal detail."

Chris suggested it was either "given to friends to give to the authors" or information learned from "some kind of backroom chat".

The royal couple have been 'silent' on new biography Finding Freedom

"There is no denying the detail in this, every extract is conversations she had on FaceTime in the bath to when Harry first said 'I love you' to her, details from their first date, it's all very personal stuff," Lizzie said.

She added: "If it's not from the horse's mouth it's from close to horse's mouth."

The new book Finding Freedom, by Omid Scobie and Carolyn Durrand, previously revealed that Harry used the "ghost" emoji in his texts to Meghan while trying to charm her.

Meghan was said to find his messages "funny and adorable".

The book also claimed that Prince Harry was "p***ed off" after William warned him not to be "blindsided by lust" in his budding relationship with Meghan.

It comes after a poll found that Finding Freedom had caused “lasting damage” to the royals.

A spokesman for the Sussexes, who now live in California, US, previously said: "The Duke and Duchess of Sussex were not interviewed and did not contribute to Finding Freedom.

"This book is based on the authors' own experiences as members of the royal press corps and their own independent reporting."