Not that I'm going to do it, but just for the sake of argument... what would happen if I were to purchase one or more fully flexible expensive airline tickets before September 30th, transferred any DC miles I may earn for doing so prior to November 30th, and subsequently have circumstances change such that I would like to cancel those tickets...?
I believe BA charge £15.00 to cancel a booking, even of a flexible ticket. Also I am not sure the CC fees would be refunded.