The queen is expected to appear twice on the balcony of Buckingham Palace on Thursday, but Prince Charles played a key role during the event. Mounted on horseback, he also took a salute, from ranks of scarlet-clad Guards, on his mother’s behalf, along with his sister, Princess Anne, and his son Prince William. Elizabeth has had trouble getting around of late, and her courtiers have been careful to keep make things as simple for her as possible. Senior royals including Prince Charles’ wife, Camilla, traveled in carriages to watch the ceremony from a building overlooking the parade ground.
