CAX will attract passengers and you will find that there will be more pax traveling from CAX than enyone on here would have thought, people on here must stop thinking pax would use NCL over CAX, what people are forgeting is that it wont just be Carlisle residents who will use CAX, there are many 1000's of peple who live in large towns such as Workington and Whitehaven who are crying out for CAX to open up for passenger flights, the people who live in these two towns alone have to travel 2.5+ to get to any Airport at the moment but when CAX is up and running this will be reduced to around one hour...
I do think that CAX would be better off attracting airlines such as Ryanair, Easyjet or Jet2, there will not be so much demand for CAX-LON unless the LON Airport is LHR, STN or LTN. I have nothing against SEN but the destinations at this time are just not there, unless somthing like CAX-PMI via SEN is put in place.
I could see people traveling for eg, CAX-STN then on to Ryanair, Easyjet, Airberlin ... just think of the 100's of "connecting" destinations that would be available ... But only time will tell...