Just to add that I don't think it's that unreasonable for Nicola, and especially Lawrie, to be so ignorant of the basics of Christianity. It's perfectly possible to go through seven years of C of E boarding school without listening to a single word spoken in an assembly or church service and not understanding the words you do hear and not caring enough to ask anyone to explain it to you.

I remember once, about 10 years ago, meeting a very confused girl who was indeed at an English boarding school who thought Jesus died twice and rose twice, because people kept talking about him 'rising again.' So Lawrie "obviously they were all Christians" doesn't seem so unlikely to me.