I doubt it was simply the cause of BAA.
EDI and GLA are quite close together (1 hour between the two airports) and from EDI to NCL it is 2.5 hours.
EK could probably serve EDI with an A332 but why go to the expense of serving the same community as GLA takes while it also means most likely affecting GLA's load?
I would like to see EK at EDI as I think they could make a success of it but I just can't see, in the current climate, them being able to maintain their GLA loads with an A332 into EDI.