You are missing a 2nd B753 at LGW, and a 2nd B763 at MAN!
I'm not......they share the programme of 1 B753 and 1 B763 between 2 of each during the winter.
What's planned for the other A330's & 757's over the winter period? Are all remaining aircraft being leased out or parked up? According to Wikipedia the fleet consists of 44 aircraft?? Correct?
The same as happens every year....some go to the Hadj....some to Canada....