bmibaby's replacement...
I know you never say never, but given these quotes from Philip Meeson of Jet2 on the NIA website following the launch of additional NCL flights, I don't think it's going to be LS.
“Today, with the addition of another four terrific Spanish destinations, we have set our sights on continuing to serve the people of Newcastle, Teesside and beyond by offering them low cost fares to the destinations of their choice"
“Of course, with bmibaby pulling its operation from Teesside, we anticipate even more passengers from the south of the region making the short journey north, in fact bookings are already suggesting the people of Teesside love Newcastle Airport and our low fares to boot.”