Okay - we settled on a trip to Portugal next June, 2016. Want to use my BA Companion Certificate to fly First Class. Big devaluation coming for FC seats - what would now cost 150,000 miles for the two of us looks like would end up being well over 200,000 if we book it this July - earliest we could book for June. A newsletter I receive suggests that a good alternative would be for me to book seats right now for February (seats plentiful) and then change the dates in July for our desired June flights. It claims it can be done easily and with no charge as long as the destinations are the same and the only change is the dates. So does this sound reasonable and legit? If so, do you assume they would let me change dates without canceling and rebooking at the higher award rates? Hope someone knowledgeable on Avios has the scoop on this. Many thanks.