So Glasgow (Prestwick) is EGPK - P restwic K ?
Glasgow International (50 years old this year) is EGPF
but Glasgow (Cumbernauld!) is EGPG - wouldn't it have been easier to give this to Glasgow International and make Cumbernauld EGPF?
Edinburgh is EGPH - couldn't it be EGPE, but that is Inverness. Which could have been EGPH for Highlands, since I suppose Islay got EGPI (but could have been EGPW for Whisky?!)
But then EGPW is for Unst, since EGPU is for Tiree!
Aaargh! None of it makes sense - except that, fromwest to east it is Glasgow Int (EGPF) Glasgow Cumbernauld (EGPG) and Glasgow East (Edinburgh EGPH)
And there doesn't seem to be an EGPP master station - unless that was the old Renfrew?