ScotsSLF,
How many passengers does the airport handle per year?
What level of subvention has it needed?
Pax for 2015 from memory circa 600K, correct me if wrong.
Personally, I have no prejudice for PIK... Though given the pax numbers and the Scottish government investment, people are well within their rights to deem the facility unviable in terms of being a passenger airport.
I doubt many can give you the specific £ detail you want, but given 1 the competitive environment, FR will be getting a good deal, 2 the cost of running an passenger airport is far above the revenue generated from the pax numbers.
If PIK can carve a niche for itself as a cargo gateway or maintenance point, it could well survive. Though I'd suggest unless they can get the pax numbers up to and above 1.5m power annum, there is little case on a commercial basis for keeping a terminal open.... All of course based on my own experience etc on airport stuff.
Others worth less survive but these examples have other circumstances, like no based airline hence shorter days etc.
EI-BUD