Greetings,
From where I sit, in the UK, it has seemed for a long time now that Christianity is dying out. Statistics may point to the UK being a country with a Christian majority, but many are "Religious in name only", as KAding mentioned. Religious statistics should also never be trusted as a general rule, of course.
There are, of course, many Christians still around, and Christian charity groups such as the Salvation Army and CAFOD are still well-respected in the UK for the work they do.
For some reason, (and it might be interesting to discuss why), overt displays of religious belief seem to be less common in Britain than in other countries. Tony Blair could only openly convert to Catholicism after he'd relinquished the post of Prime Minister, for instance.
In my school, a boy started refusing to go to lessons because he wanted to pray for ten hours a day; the head brought round the school counsellor and had several psychiatrists ready to come and see him. He was an intelligent, sincere person, and he wasn't just being lazy. He was at a Christian school, and felt that was the best way to express the faith he'd been taught. You can make your own judgement, but I think the head's reaction shows something about the way "excessive" religious belief is viewed in Britain.
Abandoned churches can be found all over Britain. There simply aren't enough worshippers to fill their pews. Some have been turned into nightclubs, restaurants or theatres. Many are just left to decay because no-one can afford to maintain them. It's a sad state of affairs for anyone who cares about architecture or national heritage.
These are just a few thoughts about the state of Christianity in the UK, and I hope they are of some use in the discussion here.
In an attempt to sum up:
In Britain, there are many Christians, and there are many non-Christians; there are Christians who don't shout about it, and there are "Christians" who actually don't believe in god; it's also worth pointing out that there are also a lot of perfectly sincere Christians in many nations who know next to nothing about the contents of the Bible, and any perceived "decline" in Christianity could have something to do with that.
Peace