There's no guarantee that the Flybe aircraft will remain in Europe, never mind this corner of Europe.
The best hope may be that Stobart now have 5 aircraft spare and BHD may be an attractive option for them, if they can get Aer Lingus agreement to operate as Aer Lingus Regional. However, there are a few problems in terms of getting Stobart in. Other airports in the UK and Ireland will also be eyeing them and in particular, Knock can offer them the opportunity to operate with the known EI Regional brand and freed-up routes to Manchester and Birmingham that are cash cows with no nearby competition. Also, Aer Lingus mainline will want a replacement operator on DUB-SOU and DUB-CWL for the 100K+ connecting passengers and getting Stobart is the easiest immediate solution.
And, of course, as EI-BUD said, it may be for the next few months that operators will lose less by leaving aircraft on the ground.
Most other potential operators are already at BFS and will have no desire to take the extra cost of operating at both airports.