Has the move gone ahead as planned? I can't see any reference to it on FR24.
As sad as it is, the days of the Boeing 757 as a passenger aircraft are numbered. TUI are withdrawing their ones that are a lot younger that Jet2's.
I've noticed that 2 of Jet2's 757s haven't seen service for a while. G-LSAJ and G-LSAC. Are these both withdrawn? I know AC had a few technical issues over the summer season.