A not completely unrelated question: I'm watching THE CROWN on Netflix and just finished the episode where the Princess Elizabeth is told she may choose the name she will use as queen. Her father and uncle both chose new names as their "monarch" names (i.e., her father was named Andrew, but chose to become King George).
Does CHARLES III address this? Obviously, the play assumes Prince Charles will keep his given name if and when he takes the throne. Perhaps it's the new tradition?