Passenger Nos at NCL
I believe one of the reasons for lack of growth at NCL is the huge increase in flights available from EDI.
Once upon a time when EDI was a BAA airport flights were quite limited. They seemed reluctant to allow LCC in. For this reason passengers in Scotland and the borders would use NCL as it had a greater choice than EDI at that time especially the charters.
However I dont think there are many destinations available from NCL now that are not available from EDI. Of course there are also many more destinations available now from EDI than from NCL.
Look at the Easyjet and Jet 2 expansion up there. I think there would have been much more expansion at NCL if BAA still owned EDI. However they dont and the situation will only get worse if APD is reduced over the border.