Re-posting from chat as I have only just found this section...
We are staying with friends for Christmas and they have just asked us if we would like to attend midnite mass with them. I haven't set foot in a church since I was 10 but have to admit I am not totally adverse to the idea although I do feel a little uncertain.
They are CofE and I understand that the church they attend is known as a "High Church" but beyond that I know nothing about this subject. Can anyone tell me what the service is likely to be like? Do I have to dress up? Am I likely to feel really out of place and uncomfortable?