NorthSouth are you trolling? Scotland would have a fraction of the direct long haul it now enjoys if they turned the clock back to saving George Younger's seat with a crazy airport policy. Perhaps all DUB long haul should stop once more at SNN?
Any long haul carrier is free to start ops at PIK today and sell it as a hassle free unconstrained hub. No one has simply because GLA/EDI are way better options to the airlines.