In the late 1980s and early 90s the MoD had a check in desk next to one of entrances to the terminal with the title of SMITH AIR. It stood out like a proverbial sore thumb with rather clean shaven and short hair style gents lining up. It also had an outside wall on to the concourse - not a very good idea in those days regarding the Irish problem!
Also remember in the late 1960s the Open University using the airport to film exterior scenes for a programme - I think resembling a French airport. Remember the sliding doors at arrivals!