There will be plans to retire some more 733's, though other than G-CELU, I don't know if any more are scheduled this winter. I believe that G-CELC, is in the process of being scrapped now.
As far as I am aware, the timetable is complete for summer 2015, or at least it should be, given that Jet2holidays are offering holidays for up to the back end of April 2016.
