NCL - I believe that there will be more than 1 plane based there in the not too distant future. Up until June, I know of at least 6 F/Os who are going there - including myself.
Routes are basically going to be Gatwick, Cardiff and Aberdeen with an occasional Limoges thrown in for a bit of variety.
As for expansion plans, Mike Rutter was quoted as saying that there are plans to launch services to Scandanavia and Germany, so watch this space.
In the meantime though, from what I've heard, NCL is pretty full.