At the risk of covering old ground, I still feel that a LCC at HUY is still a feasible possibility for the future. I see that some have mentioned FR of late, and whilst any LCC would obviously be welcomed, the 738 capacity could be a limiting factor. Considering FR's current network, this could perhaps at best offer a daily DUB and 2/3 weekly MJV and GIR services (latter perhaps seasonally affected).
FlyBe would seem to have to best capacity options with the Q400 and 146 (with EMB-190 to follow), but are they interested?
Jet2 have apparantly looked previously, but perhaps will look again. They seem committed to becoming the dominant LCC in the north of England. A based 733 could perhaps operate a daily AMS, together with say, 4 weekly AGP and ALC and 2 weekly PMI/MJV/FAO in the summer, with the PMI services switching to GVA in the winter and maybe one of the ALC flights changing to Chambery.