Thanks Dollyroux. That is awesome. When I looked into distance schooling before everything I've read insists you have a postal address, but this looks like a real possibility. Thanks so much.

ETA: Thanks Cassius2. Just saw your post while I was typing. I'm definitely going to talk to the school. My concern is that we're looking at being gone for a minimum of 12 months, so the girls are going to effectively change years at school so not sure how that's all going to go.