Apologies if this has been posted already in this thread and I've missed it, but some figures are available from an answer to a written question from an MP.
Air Force: Cadets:Written question - 7851 - UK Parliament
In summary, since 2013 ~90% of instructors have lost qualifications (560 prior to the 'pause' and 61 now), and the number of cadets awarded wings in 2017 is ~6% of the number awarded in 2013 (741 vs 11,748).