If crime hasn't dropped how come the self reported experience of crime surveys (i.e. not reported crime) show a trend that's similar to reported crimes?
We're not talking about a small sample size here either - we're well into tens of thousands of people surveyed annually on their experience of crime and the downward trend isn't just a UK phenomenon; it's a global trend which some researchers have linked to two things:
1. A much longer term downward trend that started more than 200 years ago i.e. society is becoming more civilized
2. The removal of leaded petrol / additives of benzine from lead replacement petrol, both of which have been linked to neurological problems and violence