Thanks for that. I've not done a B2B before, but have started ex-Europe with Qatar.
As for the CW dorm
once asleep I don't care, but we have a small stash of Avios (175k between us - with a 2-4-1 about to expire, and another already in the account!), so may look at using them if upgrade availability is there (I have ExpertFlyer, so can set an alert.
Lots to fiddle with, thank you