Read what I wrote, they don't prevent crime.. They don't even prevent prevent fender-benders at busy road junctions.
Jamie Bulger is still dead and the two who killed him are still alive and at large, I believe, although I haven't followed their everyday movements. Even if they're still away, they're still alive and will be out one day.
Don't know about the the other one you mentioned, but did CCTV prevent him exploding his bombs or catch him after the event, again?
They are NOT for our safety, and the 'if you have nothing to hide' argument is fatuous, too. I have no criminal record, have a good credit rating, live in a respectable area, never put myself in a dangerous situation, work for a living and pay my own bills. Why should my every movement be watched over as soon as I leave my house? Why is it so important to someone that everywhere I go, I should be able to be tracked from CCTV cam to CCTV cam? Why not put that CCTV money back into 'Bobbies on the Beat'? That would be more to do with 'Our safety' than CCTV everywhere. In the UK, we've sleep-walked into becoming the most watched-over country in Western Europe.
And please, don't tell me 'Nonsense' in such a dismissive manner. Just because my beliefs and attitudes differ from yours, it does not make them nonsense. I don't consider, nor comment, that your beliefs and attitudes are nonsense, they are just that....different.