For every 3 people who reside in the North West and are flying from Manchester airport there is 1 person who lives in Yorkshire and Humberside who has travelled all the way there to fly!
Not to Tegucigalpa or Manila but to Frankfurt, Brussels, Florida, Dubai - and many many more routes that are 100% viable from a well located and accessible unrestricted airport within Yorkshire that pools the catchment population in exactly the same way that for example BHX does.