Enough
"The possibility that they might be wrong does not seem to have crossed their minds in 13 years"
The amusing thing is that it still doesn't, now that some common sense is prevailing!
WRT the CRB system, I would remind anyone listening that it is still run by Crapita, possibly the most inept consultancy firm on the planet, who have thus far wrongly identified several thousand applicants as criminals, ruining their jobs/prospects/lives for ever (who's going to believe that your record has suddenly become clean?) and putting even more people off working with children because of the NL 'guilty until proven innocent' culture arising.
One effect is that there are now almost no male teachers in the primary school system.
Scrap all of it - we managed before!