Question is, why "from Northern Ireland" and not from one of the airfields in the UK ?
The airfield identified to me was Millisle ,it had not been completed and was to be a USAAF replacement crew training unit, it had an exceptionally long runway and the whole area could be sealed off by closing six roads . Also most of the mainland airfields were rather crowded and busy, thankfully it never came to that but with the main NI fighter station eight miles down the road it is the perfect spot.