but the decision is really only one person's, the HP.
So the Captain is the commander for the whole flight except the most critical phase of the whole operation. Nice one BA, really makes sense.
PS. All this I know already, it's been covered loads of time on pprune. I just like stirring it up about what IMHO is a pretty stupid way to operate and one that is out of sync with just about all other operators AND the recommendations of both Boeing and Airbus, ho hum, guess BA know best.