Talking of Police helicopters I was looking at the Mersey website
Very open and transparent about the "important" work the helicopter does. looking at most of the calls they are false alarms or "suspect checked correct" another fabvourite seems to be "High visibility patrol". Just look at some of the incidents and stop and think what each point REALLY means.
Bear in mind the Police helicopter cost about £5,000,000 a year each to run - that's an extra 200 Policemen on the beat per helicopter.
The Police USED to be about preventing crime - nowadays they just make a token effort AFTER the crime has been commited.