The CAA does not state if an exams ready or not. They must follow the EASA rules, so
pr definition this exam is ready now. However, since the CAA approves the training manual for every ATO, they can just delay the approval until they are ready with the exams.
I know of schools (in DK) that are in the progress of developing the 8 hour DL course. They only wait for the TK to be announced, before finalizing the papers.
MrAvarage ->
I do not see how a CPL rating would qualify you for IR TK. CPL is strictly VFR.