Back in the days of Brymon and the PLH-NQY-LHR route you had passengers from LHR-PLH and LHR-NQY then the joiners at PLH- and NQY- for LHR. It's a difficult balance but nowadays with considerably better technology it fare trends should be pretty easy to gauge. Move forward to Air Southwest and we managed it fairly well
But you're getting away from the fact that PLH & NQY only became combined for a solitary (6 month) season until Brymon's 4th DHC7 arrived ..... An aircraft that never arrived.
25 years later ASW remained peeing off the punters with combined air services!!!
P.S. I know of you "EGHQ", if you don't believe what I say then ask a Councillor that we both mutually know
