CabinCrewe,
When Flyglobespan operated from ABZ with 1 based A/C the demand was quite high, at least to the routes and the frequencies they operated, IIRC to ALC, AGP, FAO, PMI and TFS, around 2/3 weekly each. They had a 737-700 based there, but even used the 737-800 during some of the summer peaks so the demand was definetly there.
Jet2 could very well replace that gap left from GSM for sure.