As far as I am aware, ground school is now at Gatwick and flying phases are at taking place at Phoenix and/or Antwerp, MCC is still at Gatwick. New instructors and new contracts. Operation is still running just not as streamlined as it once was when based at Oxford. In regards to the aircraft and where each phase of the flying is being done, I have no idea.
Pre Covid, Easyjet had 3 inputs of cadets from CAE: Easyjet MPL, Easyjet-tagged ATPL and Whitetails interviewed during/post IR phase of their integrated course.