With millions of CCTV cameras and one of the largest DNA databases in the world, the UK is among the most watched places in the world.

But how does the technology work?

Below is a guide which explains how some of the main types of surveillance operate.

Drone ANPR CCTV Bugging Trackers Databases Keyloggers DNA Biometrics

Zeer informatieve site van de programma reeks Who's watching you


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