It is good to see schedule services again. When I was learning to fly at Carlisle in 1972, DanAir provided a successful summer service to Jersey and the Isle of Man using HS748 and Viscount. Plessey Decca 424 radar worked well with talk down to half a mile.
Air Ecosse with their Otter started the 'hop scotch' services in 1981, followed by the Shorts360 to LHR. The fare structure at £144 eventually killed it off. Then NewAir, a flash in the pan, with a Jetsteam 31.
A successful operation is dependant upon a reliable service. The components are many but includes a serviceable aircraft, and the ability land from an instrument approach.
This elderly Saab will need a fair amount of TLC.
The summer months weather wise will be 98%+ successful using a NPA. Newcastle will pick up a few diversions.
The challenge will come probably November to March. Not so much fog ( invariably a passage of a weak warm front) which Carlisle suffers from probably a few times a year, but Cumbrian low cloud requiring a 200' DH / RVR 800m.
Once the customers patience is tested that will be the critical point.
I hope that CAT 1 ILS is on the shopping list to ensure an enduring service.
The local spotters will no doubt keep us informed.......