The British tolerance for cameras, and other oppressive behaviour by the police, is actually very high. Football fans have been subject to all sorts of illiberal measures ranging from face recognition to passport confiscation for decades. The rest of the public support it because they like order. See also the "ring of steel" London security system and everything related to terrorism.
This is partly why there haven't been any significant anti-Brexit protests; the police have very effectively dismantled the structures from which violence might spring.
This is partly why there haven't been any significant anti-Brexit protests; the police have very effectively dismantled the structures from which violence might spring.