After some more thinking, I probably forgot about the established church, being the inextricable link between Sovereign and Church.
Which leads to asking -
1. is the established church Christianity or the Church of England,
2. is the Sovereign crowned in the Abbey as King or Queen of England, or maybe King or Queen in England.
These angles I pursue because I see any future British Coronation facing many challenges because the world has changed vastly in half a century.
Responses are not allowed!