Hi RN7,
I knew you were from here as well - what part are you in? No problems on the typos - I'm more than guilty of those myself by times
I know there are a load of other airfields kicking around, but Ards and St Angelo are two of the bigger and busier ones I know of, plus there used to be an regular army/UDR base at St Angelo, which would probably still be there in the Twilight world.
I wasn't aware of Ryanairs interest in Langford, and I just looked at it on googlemaps, and I have to say I didn't realise the runways etc were either so big or so well maintained - I can definitely see it being brought into use as an airfield in T2K.
George Best/City Airport has been a fairly major facility for years - I can remember a weather recon Canberra flying from it when I was wee, and I think they assembled and serviced F86 Sabres there when the RAF was operating them. I know they flew Buccaneers in and out of there for maintenance as well - my brother can remember one of them crashing in 1972 and one of the ejecting crew landed in the park at the bottom of my mum and dads street. I reckon it could well be in use as an airbase in T2K as well.
Keep up the good work