True, it depends on individual methods for data collection. Still, there should be some evidence for the effectiveness of video surveillance. https://en.wikipe

True, it depends on individual methods for data collection. Still, there should be some evidence for the effectiveness of video surveillance. https://en.wikipedia.org/wiki/Crime_in_London https://en.wikipedia.org/wiki/Crime_in_London doesn't really reflect a significant influence. It is falling slightly, just analogous to almost any other European city or capital.