I’ve read SBZ opening post and not much else.
I would say that the UK is a ‘post Christian’ county that is moving towards modernity.
The link between church and state in the UK is mostly froth, pomp and tradition as the governance here is very much secularized.
Statistics relating to the UK population by religion are often nebulous and inaccurate I suspect. One superfluous question as to an individuals religious alignment reveals one answer but further more penetrative questions would expose a different landscape of religiosity. For example – in regards to Christianity, many have a pastural or cultural sense of identity and would say they were C of E on a questionnaire because it’s been inculcated in them from a young age. However if that same individual were asked if they actually believed in the fire and brimstone elements of the Bible i.e. virgin birth, rapture, resurrection, most would say no – or at least they would state their belief of Christianity was a very personal interpretation that was free not to accept some or all of the supernatural/miracle claims as real historical events, rather they choose to view them as allegorical or metaphorical. For me that position is such a distillation or dilution of the Bible that their belief is Pascalian and not worthy of a tick in the C of E box.