Delta 767
In regards to the Delta that departed and was unable to retract his left wheel:
I was working on sector that morning and he did infact level off at 6000ft for around 30 miles north of Manchester to allow him to try and rectify the situation.
However after many minutes of trying he requested to divert to Gatwick (this being the reason you never seen him return to Manchester). He did infact fly all the way to Gatwick at 6000ft.
I bet everyone with a window seat got a good view!!