Im not sure why EI-GHK has move back to belfast as Connect Airways Group have been in administration since 10th March,
Stobart Air and the Aer Lingus Regional routes have not affected, unless they are looking at new franchise partner since collapse of Flybe,either Eastern Airways or Loganair.
Also could be that Stobart Air might need the room in Dublin, there is 1 ATR 42-600 getting painted white at the Moment and 2 ATR 42-600 Maintenance in Denmark and Sweden