Lets take a hypothetical example, say every CCTV camera in London that is available to the police is tied into facial recognition databases, then those results

Lets take a hypothetical example, say every CCTV camera in London that is available to the police is tied into facial recognition databases, then those results are stored by the police; They then gain a massive database of the movement of people that would otherwise have not been available. The important thing here is that none of this requires additional data. Even if none of this data is in any way admissible in court (it is and has been in the past), that still gives the police massive leverage over knowing innocent (remember innocent until proved guilty ) people's movements, without consent, probably without knowledge. How you can claim an idea like this isnt a shift in power to the police escapes me.