Unbeknown to me , the events had started to unfold when I was on a plane taxying for departure at Frankfurt Airport . We sat at the runway holding point for 45 minutes , which was unheard of , and everyone on board was getting a bit restless, thinking there was a problem with the plane . Then the pilot told us that German airspace had been temporarily closed, but even he didn't know why. We then departed , there was no further announcement or any mention of what was happening until we arrived at Glasgow , with everyone turning their phones on followed by a barrage of text messages !