BAA built a very nice new STN against all airline advice then paid the price when reality kicked in. It has lovely facilities and growth potential galore as it's not as busy as it was supposed to be.
MAG are looking to make something of STN but the main reason BAA gave up and concentrated on LHR is that they tried everything to get other airlines in and no one was having it. BAA got badly burned by the whole debacle, all credit to MAG if they get things on a surer footing, but the transport strategy that got us to where are now was a fantasy in the 80s, compounded in the 90s then forgotten in the noughties.
They had pretty much forgotten about it and just wanted to offload.