Fewer than one crime is solved by every 1,000 closed circuit television cameras, the Metropolitan Police, Britain's biggest police force, has admitted.
So, to solve one crime, we have to fit, install and support 1,000 CCTV cameras? How much does that cost?
A large proportion of the cash has been In London, where an estimated £200 million so far has been spent on the cameras. This suggests that each crime has cost £20,000 to detect.
I can't help thinking that maybe hiring a few more coppers on the street might be more effective.