FILE - Britain's Queen Elizabeth II, right, greets Prime Minister Boris Johnson at an audience at Buckingham Palace, London, Wednesday June 23, 2021, the Queen's first in-person weekly audience with the Prime Minister since the start of the coronavirus pandemic. In seven decades on the throne, Queen Elizabeth II saw 15 British prime ministers come and go, from Winston Churchill to Margaret Thatcher to Boris Johnson to Liz Truss. (Dominic Lipinski/Pool via AP, File)