On the official website of the Royal Family, however, she was simply referred to as Her Majesty the Queen.
According to palace protocol, the Queen should be addressed as “Your Majesty” or “Ma’am,” not “Your Royal Highness.”
Actually, “Your Royal Highness” was used to address any member of the Royal Family other than the Queen.
Typically, female family members are addressed as “Your Highness” or “Ma’am.” Male members of the Royal Family should also be addressed as “Your Royal Highness” or “Sir.”
Similar to other members of the Royal Family, the Queen’s title has evolved through time. She was known as Her Royal Highness Princess Elizabeth of York until 1936, when her father, King George VI, ascended to the throne (at which point he started being called “Your Majesty.”)
York was omitted from Elizabeth’s title since her father was no longer Duke of York.
As a result of their marriage, he became the Duke of Edinburgh. This resulted in Elizabeth’s title becoming Her Royal Highness The Princess Elizabeth, Duchess of Edinburgh.
This was her last title before becoming Queen Elizabeth II in 1952.