Hannah, welcome to TA - It's a great site for freethinking atheists :)
Being a Dane I can very much relate to your position - it is the exact same situation in Denmark. Here being a member of the church is kind of the default state: it's just there, it's practical for marriage and funerals, we simply don't have to think about it much and the church has no need to seek out members - I believe that this is the main reason most people don't really care about nor exercise their religion and if you ask them most will admit that they don't really believe.
Now, on another much more important matter - give us back our North Sea oil resources that your country stole from us those many years ago! We made you rich and don't you forget it! haha ;)