The problem faced by Newquay is that London airports suitable for a Newquay service are now so busy relative to runway capacity at times of day commercially useful to a Newquay service that nobody wants to waste a precious slot when a run down to Spain would make more cash.
Can PSO really ameliorate the situation sufficiently that it makes the slot issue no longer a problem for NQY ? From what I can tell, applying PSO rules to a route usually leads to significant rises in air fares - would demand for the route sustain the fare increase and prevent too many people moving to the train ?