[raxxorrax]

I don't think safety is the primary issue, since it often isn't applicable to most cases where help is needed. Even though we focus an absurd amount of efforts to increase it that can only be described as madness, it is astonishing how much people are willing to risk if they are put in a situation where someone needs help.

But there are effects like the bystander effect that reduce the probability of help the more people are around. I would think CCTV would act as a similar way for people to question their impulse to help because of their surroundings.

A conscious decision could also be made here since many developed countries have laws that make the act of helping more dangerous from a legal perspective. Oh, you call that a cardiac massage? You killed that poor guy... [exaggerating here]

Why take any responsibility if big brother is around?

I have no data, just suggesting that it may be interesting to test something like that.

edit disclaimer: I regard CCTV as tech garbage that provides no value if it is used to identify people. GB is no more safe than other comparable countries that don't have it.