About the RC being specifically barred from the throne. It was only a two horse race in those days (after Henry broke with Rome, it was obviously only RC before that) so other religions or none were not in the mix. It was about power really, wasn't it. If one lot (courtiers, grace and favour, plum positions) came back in, the other lot would lose their position and lands again. By making it illegal for RC's to come back in, the incumbents of the time, the lot whose fortune was allied with C of E, cemented their position. I read somewhere they skipped the next 52 (all RC's) in line to the throne after Anne, who had a greater claim to the throne than George 1. I'm not sure about the exact number. In light of this, I have to laugh when people say they can't possibly skip Charles to go to William (disclaimer: not that I care either way)
Yes, the head of state is Anglican for 500 yrs. But the monarch was much longer an RC.
Many religions have come and gone (from mass adherence). Druidism and Roman Gods and Woden etc. Then Celtic church, then RC, then C of E. Wonder what it'll be next?
It is nice to be free to choose how you want to explore your spirituality, without a specific belief system being imposed. I know a few people who are quite taken with some elements of Buddhism. People who would have no connection with areas where Buddhism originated.
Someone said how Royal centered this thread was. The monarch is the hereditary head of state in the UK. They represent and are symbolic of the state. The C of E is the official religion of the state. That is a form of Christianity. It is a statement of fact. Whether you agree or disagree with a hereditary head of state and even with them being the head of the national church (and anointed in the name of God by that church) is another matter. I know you didn't mention that. I'm just saying.