Most of these 'facts' are made up as they go along, wishful half-cocked thinking, with no inside information and no facts to back them up, little business knowledge and comparisons made with different type of flights to different parts of the world.
If various airlines have looked and the demand is there why are there no flights? There are many reasons why we don't and won't have this route.
AA were selling well from Newcastle before they pulled the flights
Prove it!
Finally the Britsol example is totally different and should not be used to draw an conclusions as to how a Newcastle service would work.
Explain!