What I would really, really like to know (but never will) is whether various services that run for a while then stop are attracted by sweetheart deals, discounts, marketing support etc and when that runs out the route doesn't prove to be viable. And another thing, it is time that Scottish airport managements stopped going on about APD. It's not going to go away, it's not going to be reduced (manifesto or no manifesto) and businesses need to plan on that basis. I will, however, accept complaints about the Brexit omnishambles.