Prince Harry gave a surprising three-word reply when an aide accidentally called him "mate", a new royal book has revealed.
The book called Courtiers: The Hidden Power Behind the Crown, by Valentine Low, examines the roles of those who work for the Royal Household and how they help to shape the monarchy.
It also looks at the relationships between the royals and their staff and in one section reveals the "subtle variations" between what those working for the royals call their principals. According to the book, King Charles' staff at Clarence House would use formal greetings such as "Your Royal Highness" (before he ascended to the throne) and "Sir".
