Secondly: For a number like '48%' to have come about, we cannot be measuring a reduction from four to two major crimes - that would be a 50% reduction. This MUST have been taken over a vastly larger sample of incidents. We must conclude then that they are not talking about 'major' incidents such as the two described (a sexual attack in the toilets and a fight between two kids that erupted into a major street brawl). So what this fingerprinting exercise is all about is reducing MINOR incidents.

So let's call this what it is. It's not about cutting down on serious offences - it's about reducing MINOR offences by banning people from pubs who happen to have lost their tempers or done any of the usual things that drunk people tend to do.

One flaw in your logic. According to TFA, "minor" incidents are those involving fewer than 15 police officers responding. We're talking about a hell of a lot more than losing your temper.