The key variable here is probably whether an established church catches on
> or not.
>
I've just been reminded that the Church of Ireland was disestablished in 1871, while the Church of Scotland won independence from civil control (which it had always claimed) in 1921.
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."