Some posts have suggested Ballykelly runway is 'disused' It is not. A quick 'Google' shows it remains a military airfield (Army) operating mainly helicopters eg Chinooks. The RAF flew a C130 there in 2004 to assist with the rescue of that Canadian sub. My empathy for the pilots.
Many years ago I was at the BAE Woodford Air Show A USAF jet assured us he was heading in to start his display. After several minutes no show, the tower asked where he was. "Heading home after completing my display over your airport" - Manchester Airport!