@Matt Bryant - Re: MAtt 21 Wrong measure.
And from 2010: "Number of crimes caught on CCTV falls by 70 per cent, Metropolitan Police admits"
"Prosecutions linked to CCTV have fallen in parts of Britain, raising questions about the true impact of the security cameras."
"Scotland Yard sources suggested the fall was because officers deciding only to mark down an involvement of a CCTV camera if it had formed part of the investigation. Previously officers had recorded if a camera was in the vicinity of the crime scene.
"Campaigners suggested that this change meant that the effectiveness of CCTV as a crime fighting tool might have been exaggerated by the previous figures. "
" Last summer an internal Met Police report concluded that for every 1,000 cameras in London, less than one crime is solved per year"."
Still, let's keep on having Big Brother watch us and snoop on our every move and journey and e-mail and phone call. After all, giving up essential liberties for a little temporary security has always been a good thing, hasn't it?