I see the Herald on Saturday carried an interview with the chairman of Prestwick Airport. Apart from the scratched record of associated aviation businesses next door/freight/diversions/attract more airlines other than Ryanair, his Big Idea seems to be making Prestwick a hub for Scottish domestic services via Oban, which he describes as having a "big runway".
I don't suppose anyone has told him that Argyll & Bute Council has already tried and failed to get instrument procedures designed for Oban, Coll & Colonsay and that consequently any services to/from Oban are VFR only for the foreseeable future.
With that kind of "vision" in place, don't expect announcements about Prestwick's return to the private sector any time soon.