Reading this thread with interest here in Newcastle. There do seem to be similarities between GLA and NCL in that airlines struggle to make capital cities routes stick - NCL have in the last year or so lost Copenhagen, Madrid and Warsaw - and what some might see as an over-reliance on bucket & spade routes (nothing wrong with that, although one or two people on the NCL thread have occasionally mildly berated the population of NE England for wanting to lie on a beach for a week rather than walking round the Prado).
Anyway, I'm rambling. I see Prestwick is up for sale. My initial reaction is that it will end up closing as a commercial airport. Is GLA well placed to take on the cargo traffic that currently goes through PIK (Cargolux, Air France, Cargo Logic)?