I completely disagree with most of these posts and I'm very

about the number of "atheists" shrieking that if you don't study Christianity you'll become non-British, magically lose the ability to read or enjoy art, become bigoted, small-minded, arrogant, entitled, and your head will fall off.
The National Curriculum heavily emphasises Christianity, there are other major world religions that are covered in a pretty cursory way, or not at all. It's also highly naïve to believe that every single teacher anywhere is a wonderful tolerant progressive person and that no teacher could possibly be biased or have their own belief system that colours their thinking. Have none of you actually BEEN to school? Teachers are just people like anyone else, good bad or indifferent. I sat GCSEs in the noughties, and my (non-faith school) RE teacher completely took it as an opportunity to spread fundamentalist propaganda, and be racist towards other religions. Plenty of religious minority Brits have similar stories.
And yes obviously it's important to know the basics of other religions but some posters are acting like children are being raised inside a cardboard box they're only allowed to leave for 2 hours a week to attend their RE lesson. I'm willing to bet most people learn far, far more about other religions and cultures from simply living in the world - meeting people, working with and having friendships/relationships with people of other religions, travelling and living abroad, visiting other parts of their own countries, living in ethnically diverse areas, watching TV, reading books, and just soaking up culture generally, than they did from taking a once a week RE lesson when they were 15.
I'm from a religious minority, my partner is from a different minority religion, the average person knows slightly less than sweet fuck all about our religions. If the intention of RE lessons is to turn out British adults who have a decent knowledge of all religions, then clearly it's a massive failure. Amongst my friends who have shown an interest or knowledge of my religion, every single one learned about it via books or films or via having friends/partners in that religion. Not a single one ever learned about my religion in school.
And the point about needing an RE GCSE to be able to "read most books and appreciate most art" is just bollocks. People learn FROM books and art; books and art are incredibly powerful tools for inflaming people's imaginations and curiosities and making them want to increase their knowledge. The idea that you can't possibly read and enjoy the Northern Lights trilogy unless you've already got a qualification in Christian theology already is just bananas. I've read the Narnia and Northern Lights books multiple times, I read the Narnia books as a young child before I had any understanding of the Christian themes, and those two book series were a thousand times more powerful in deepening my knowledge of both Christian theology and the ways religious belief can be exploited, than RE lessons did. I could name a dozen YA novels that contain more info about Islam in one book than RE. Similarly I have learned far more about religion by going to art galleries than in school. And really how much knowledge is someone really going to have about a specific minority religion from having yawned their way through the one or two lessons that covered that religion when they were 15?