moving North to South was never on BA’s radar nor something they ever aspired towards.
EZY combining their operations into one terminal caused it to happen. North was the only terminal that could accommodate EZY and in turn no room for both BA and EZY in the North.
BA have made a good fist of it and as mentioned above I think it feels from like home than the North ever did, lovely lounges too. Big sweeteners were offered by GAL to BA as part of the move.
in my view, looking back, the move was a good move for BA, even though it’s not one they ever wanted or planned for.