“But what she wasn’t prepared to do was – just as she was about to enter her own arena or start a cross country course - to be asked whether she was going to get engaged to somebody.
“And this of course made her very cross because she wasn’t there to talk about her private life and that’s when she started telling everybody to naff off.”
Anne became famous for her “naff off line,” as Express royal reporter Steve Wood explains.
He said: “It’s the naff off picture, when she lost it and told me to naff off and that created a storm.”
Wood’s colleague Ashley Walton goes on to explain: The truth is we made up the ‘naff’ word to cover up another word.”
And the Queen's only daughter is still more than capable of a put-down.
A new report has revealed she said something very rude about Prince William and Kate Middleton's eldest son, Prince George.
Moral of the story is: don’t get on the wrong side of Princess Anne!
WATCH: Royal fury over Princess Anne’s ‘bad-tempered behaviour'