Pogmore was a known deviant, his 'colleagues' knew this for years.
Each time these incidents took place you can bet your bottom dollar that all / some of the crew on board knew what he was doing. Even if the pilot couldn't see the footage (which I doubt), the crew would be talking about what was going on - bit of banter - lads talk - nudge nudge......
They probably ran the tapes after getting back to base for some further titilation.
Only, this unit got caught - simples. And the CPS decided to make an example of them but it didn't quite turn out to be a full blown 'clean sweep'.
It might not be a big case in the grand scheme of things but it is the thin end of the wedge and if cops of all people were allowed to get away with this sort of behaviour - what next?