I'm pleased to say that the CAA, under pressure from Flyer magazine, have published
this which shows the ATPL pass rates consistently rising to May 04 with an average of about 84% and then falling off a little in June. These seem to be the percentage of candidates passing for all attempts, including re-sits which drag down the averages. If they showed the first time pass rates they would be a bit higher.
The pass rate was were allegedly about 75% under the old CAA system.