Prince Harry and Camilla Bowles no longer have a good relationship, a royal expert has revealed.

Apparently, the Duke of Sussex initially accepted his mother-in-law, but their relationship has "gone to the boil," royal expert and author Ingrid Seward told the Mirror's "Pod Save the Queen" podcast.

Harry and Camilla have a complicated relationship because of their past with their father, Prince Charles. Prince Charles had an affair with Camilla while married to the late Princess Diana, mother of Harry and Prince William.

"When she became a stepmother, they [William and Harry] were very happy to accept her," Sward explained in a teaser video for an upcoming episode.

"Most of their friends' parents had divorced and remarried, so it wasn't really that unusual."

However, she added 'I don't think Harry has any great warmth towards her. I think William fully appreciates Camilla and what she has done for his father, and I think he has come to know her well and likes her very, very much."

Sward believes that Harry and Camilla will remain close. 'Things may have changed very recently, since Harry came over here and spent a little time with his father. 'But since Harry and Meghan [Markle] left, they haven't had a chance to be together. I don't think Harry would be interested in developing a relationship with his stepmother at this stage.'