Workington, Whitehaven etc. have been mentioned as a catchment area for CAX.
But of all the people in CAX's catchment area how many of those would be prepared to pay 'premium' air fares to fly from a nearer regional airport or would cheaper air fares and more choices of travel and destinations served from the likes of NCL, MAN, PIK etc. still persuade then to travel a little further to save themselves money whilst allowing them a wider choice of destinations?
In my experiences locals like to shout that they prefer to fly from their local airports ..... until they realise it may be more expensive for them to do so!