To be fair I suspect a lot of people like me also put they are basically non christian.
What I like is the UK life that has partly evolved from christian views, broadly. But I do not believe in god, nor that there was a Jesus (well a fella maybe but not risen from the dead etc).
There are some parts less attractive, and some of the least christian people I have met have been practicing christians! (much like the US versions)
I do not believe however that if there was some powerful being you would need to follow prescribed ways to worship them, nor specific places needed. Thats 100% a control mechanism by all religions to control your views (stop you straying mainly), and more importantly to get hold of your sestertius
If however a somewhat unlikely religious war broke out in the UK I would for sure with no doubt be a Christian should I be pushed to choose one thats got a large following in the UK.