Jonty
GS of 155 means landing with high LW and 10KTs tail wind. It is not necessary to use flap3, use full flap. The problem with flap3 landing is higher GS which changes the visual clues while landing. So there is a bit of getting used to involved. Now an inexperienced FO who was just settling into flap full landing may have again a period of uncertainity on his hands because of this and not because flap3 demands greater skill. About saving Money, it is not Airbus requirement, the Airlines want to save money. Whether any one likes it or not with increasing fuel costs operating procedures will be guided by fuel savings strategies. Offcourse operations department must lay down comprehesive guidelines for every change.