Mark,
The point I was trying to make was that PLH is in competition with EXT just up the road.
Given that there is no scope to extend PLH, and I believe South Hams to be a diversion not worthy of consideration, can PLH continue indefinitely as a tiny turbo prop only field?
Furthermore NQY has two FR rotations a day to STN that give Cornwall pax access to continental travel.
Then there is BRS a bit further up the road from EXT that also has a daily feed from NQY.
It may be that the great and the good of Plymouthare quite happy to be ferried around Europe by turbo prop. If not, I question PLH's long term survival given the alternatives all around it.