B61,
I know the following facts:
CAE Oxford only has a DK, Danish ATO approval and all students have been told to transfer medical records to the Danish CAA in order to allow training after December.
As you know initial EASA IRs can only be conducted in an EASA state, then it will no longer be possible to conduct initial EASA IR tests in the UK when the UK leaves EASA. Alot are hoping there will be some bilateral agreement to allow EASA IR tests in the UK after leaving EASA, however I have heard no confirmation of this.
CAE have IR training centres in both Norway and Belgium, in the event of no bilateral agreement it seems likely that CAE students would be sent to either of these locations for the IR.
CAE Norway were recently advertising for ME IRIs suggesting a ramp up of IR training there.