http://www.jihadwatch.org/2014/08/uk-military-jets-escort-qatar-airways-plane-to-airport-possible-device-on-board?utm_source=dlvr.it&utm_medium=twitter&utm_campaign=catholiclisa
hoax, but these types of things can be "trial runs".
http://www.theblaze.com/stories/2014/08/05/passenger-video-fighter-jet-escorts-plane-into-u-k-airport-after-report-of-device-on-board/
https://twitter.com/Telegraph