@cockney steve
Not every nation is as gung ho about CCTV as the UK and in some there are very strict regulations as to how they may be used; much more strict that the slap happy system the brits languish under.
In Spain for instance you may have a CCTV system showing people entering your shop but it may not show the faces of anyone passing by on the street; nor the faces of people once they have entered your shop.
That is the reason you will see security guards in Spanish supermarkets and shops; covert security is not allowed. The country has suffered enough from that in the past.