Prince Charles, Prince of Wales, her eldest child and heir, crowned himself King Charles III at the age of 73.
Operation London Bridge had been set in motion for years, as had Operation Spring Tide, which was intended to usher in the king's rule.
However, there are still certain things that will alter in the area during the next several days, weeks, and perhaps even months.
The national anthem for the U.K. is "God Save the Queen." With Charles on the throne, the name will change to "God Save the King."
All lyrics will stay the same, except mentions of the queen will change to king. All pronouns in the anthem will also be changed to he and him.