CCTV is contentious. Nearly everyone seems to be against it, until they become victim of a crime. Let's use a robbery (mugging) for example. At that point, suddenly everyone is pro-CCTV. The victim says "You'll be able to catch them, there was CCTV". The offender when arrested always says "Check duh CCTV, proofs it's nots me innit". (They say this even when guilty, I suspect they have been trained to do so by defence solicitors due to the following point).
The modern view of CPS tends to be a complete fear to charge an offender unless they are guaranteed a 'win' at court. This means we need some irrefutable evidence, like, you've guessed it, CCTV. For me the issue with CCTV isn't 'impinging my civil liberties' - hell if I'm out in public then why do I care about being filmed - but the fact that when it comes to criminal proceedings, rather than being the 'icing on the cake' in the evidential process, it seems to have become the cake itself.
Half the time the CCTV isn't a great help unless there's actively been a controller watching the proceeding and zooming in anyway.