One day in August 2004, diners visiting a cafeteria at Queen Elizabeth's Scottish summer retreat at Balmoral were stunned to observe the queen herself queue for lunch before walking around and chatting with them. The explanation? Elizabeth, ironically, could not enter the castle, because it was open to tourists at the time.
[Elizabeth's lunch? Venison burgers (?2), bacon rolls (?1,70), a plate of stovies and oatcakes, and, according to one witness, "she had a ?1 pot of tea too, and a cake."]