But can BA guarantee all the water is uploaded where it is safe to do so-I am not sure London has the cleanest water either. But how do the crew know how much water has been used and how much is left for the return trip.
I agree giving the crew bottled water but not pax might be problematic but then the flight deck get clean air and the pax get mostly recirculated /oil fume contaminated air. So overall i think bottled water is a good idea and no reason why its not limited to one per pax .
As to price sensitivity just flying from LHR not GW or STN makes a big difference so why not move half the flights and the price conscious destinations to LGW and save real money that way