Don't know the significance of this. Only noticed because a Boeing Sentry AEW.1 was flying a circle around Yorkshire UK. Boeing 737 EI-SEV
A ryan air corporate jet. took off from east midlands airport, then repeatedly doing circles and landing briefly (cant remember the term as not really planefag) several times at Doncaster airport. Route supposed to be to Greece, yet doing this. Pilot training before continue route? seems a little odd anyway, but if any pilot could comment.