This coronation season, punditry is bristling with acute reflections on the British constitution, especially its religious aspect. Or maybe not. There is more comment on Succession (an American TV show that half-satirises, three-quarters worships capitalist excess). But is it not at least a little bit interesting that we officially remain a Protestant theocracy?

The Protestantism of the coronation oath is widely seen as an embarrassing relic from a more sectarian age.