Duke and Duchess of Cambridge?

[Chas]

It is also the entitlement of the wife of the Heir to the Throne to use their own name as Princess this or that though again usually in this case it would be Princess of Wales.

Whilst Diana was still married to Charles she was referred to as either Princess Diana or The Princess of Wales. She only became "Diana, Princess of Wales" after the divorce which was in some ways weird as she was no longer royal and a non royal Princess is a rare thing!

Sorry Trefor, I must disagree. Diana was the wife of the heir to the throne but was never Princess this or that.

Titles and Styles

• 1 July 1961 – 9 June 1975: The Honourable Diana Frances Spencer
• 9 June 1975 – 29 July 1981: The Lady Diana Frances Spencer
• 29 July 1981 – 28 August 1996: Her Royal Highness The Princess of Wales
• 28 August 1996 – 31 August 1997: Diana, Princess of Wales

Posthumously, as in life, she is most popularly referred to as "Princess Diana", a title she never held. Still, she is sometimes referred to (according to the tradition of using maiden names after death) in the media as "Lady Diana Spencer", or simply as "Lady Di".

Diana's full title, while married, was Her Royal Highness The Princess Charles Philip Arthur George, Princess of Wales & Countess of Chester, Duchess of Cornwall, Duchess of Rothesay, Countess of Carrick, Baroness of Renfrew, Lady of the Isles, Princess of Scotland.

Likewise, Charles' current wife.

• 17 July 1947 – 4 July 1973: Miss Camilla Rosemary Shand
• 4 July 1973 – 3 March 1995: Mrs Andrew Parker Bowles
• 3 March 1995 – 9 April 2005: Mrs Camilla Parker Bowles
• 9 April 2005 – : Her Royal Highness The Duchess of Cornwall
  in Scotland: 9 April 2005 – : Her Royal Highness The Duchess of Rothesay

Camilla's style and title in full: Her Royal Highness The Princess Charles Philip Arthur George, Princess of Wales and Countess of Chester, Duchess of Cornwall, Duchess of Rothesay, Countess of Carrick, Baroness of Renfrew, Lady of the Isles, Princess of Scotland.

Regards

Chas