PRINCE HARRY AND MEGHAN MARKLE COULD CHANGE ROYAL HISTORY IF THEY HAVE CHILDREN

Any children born to Prince Harry and Meghan Markle will be a lord or lady, not a prince or princess - unless the Queen steps in.

Titles within the royal family were limited by Harry's great-great-grandfather King George V, who issued a Letters Patent in 1917.

It read: "...the grandchildren of the sons of any such Sovereign in the direct male line (save only the eldest living son of the eldest son of the Prince of Wales) shall have and enjoy in all occasions the style and title enjoyed by the children of Dukes of these Our Realms."

This means Harry and Meghan's children, should they have any while Elizabeth II is on the throne, will not be HRHs or princes or princesses, but will be known instead as Lord or Lady (forename) Mountbatten-Windsor.