Just happened upon this rather strange flight today via Planefinder
Jet2 bound for Ibiza from EMA showing it headed south, then began a return path, cirled a few times once it was back near EMA, then continued to fly north to Leeds Bradford where it apparently landed.
Heres its flightpath
Having now checked, the link doesnt work but clearly it is flight LS643
[Edited 2013-08-23 09:02:18]
Flightaware showing the same route on LS643
[Edited 2013-08-23 09:03:27]