To add to tigertanakas comments:
NCL to Stavanger & Bergen from Norwegian or other LCC (Braathens had a daily 737 service to Oslo,Stavanger & Bergen inmid 2000s before SAS takeover, so a low cost operation would surely bring in volume. Wilderoe exiting SVG end of this month. Maybe Airport would want to attract Full service operator to maintain a equal split and better Airport margin on revenue.
Add Berlin & Milan (MXP)
Gatwick may work with connecting to Alliances as well as BA, but these tend to be fed into larger hubs: Star via Lufthansa/EW, Skyteam via AMS/CDG.
Low cost carriers could feed into all airlines if agreements are successful. Gatwick Airport are also launching a connecting agreement which compensates for missed connections, but does not arrange through ticketing/baggage.
David Laws (Newcastle Airport CEO) recent article - Route plans about 4/5th through article:
Monday interview: David Laws, chief executive of Newcastle International Airport - Chronicle Live
Double Daily to Dubai and Leisure service to Las Vegas on his radar!
Quite a few people from our region also do Orlando either via Manchester with Virgin or via LHR (VS,BA/US Airlines) May be theres an opportunity for another service to Orlando from NCL as well as TOM (TOM and TCX used to compete/serve Orlando at least twice a week not so long ago)