That's worked to a degree with Blue Islands, Loganair and Aer Lingus Regional (Belfast City). Would KLM Cityhopper operate to Amsterdam and also Air France to Paris? Almost certainly not both - AF/KLM don't operate to both Amsterdam and Paris at some UK airports considerably busier than EXT. I can't remember either KLM or AF ever operating at EXT in the past so, if that is the case, they would have no past history upon which to assess a likely market. Obviously doesn't rule them out altogether though. KLM or AF would be a big boost to EXT. Didn't expect Ryanair so never say never about anyone within reason.