Re: Cough
If you took the entire cost of the the London CCTV infrastructure and staffing and invested it in the NHS you'd probably save far more lives.
Maybe. Maybe not. What would be certain however is that after the next terrorist attack, we wouldn't know what happened, where it happened, and we'd have scared tooled up cops running around confused about what to do and where to go.
As someone who lives, works and socialises in places terrorists seem determined to attack, I'm OK with a little video action. No, its not going to stop the attacks, but it might minimise the effects and prevent another Bataclan.