easyJet
If you guys do lose easyJet, you have my full sympathy, since we down the road know what it's like to lose your biggest customer! Having said that, as someone briefly touched on above, I think Jet2 would immediately announce an expansion & turn NCL into a proper base.
I do think there has been some kind of falling out between NCL & easyJet and if MMEs owners, Peel, were on the ball (which they're usually not) they would offer easyJet a very sweet deal to operate into all three of their airports & not just LPL & DSA.
It sounds kind of strange, but everyone could win if they do go!! You've got enough airlines to more than adequately replace easyJet & we get a based loco back.