@LN-KGL
To the other points you made, PSO - indeed, this is possibly the one silver lining in all this, that the route now has a single company operating the only transport services (the Scillonian Ferry and Skybus having the same parent company).
DGPS/LAAS approach - indeed, I remember discussing this with someone a few years back, unfortunately I believe it is still very expensive to have the kit installed on the airfield. An EGNOS based approach seems far more likely [
http://www.essp-sas.eu/downloads/bws...erney_lpv.pdf]