Prince Harry and Meghan Markle are “dreading” the release of a tell-all book giving the Princess of Wales a voice, a royal insider claims.

Gary Goldsmith, who is the brother of Princess Kate’s mother Carole Middleton, is preparing to give the family “a voice” against accusations from Harry and Meghan.

The book will reportedly reveal “private family details” and will “set the record straight” almost a year after the release of Prince Harry’s bombshell memoir Spare.

A royal insider said: “When Harry was originally compiling his book, his publisher was confident William wouldn’t comment, because it wouldn’t be fitting for a future King to do so.

“Harry wouldn’t have anticipated such a comeback from Kate’s family. He and Meghan won’t like it one bit and will be dreading the book’s release.”