People here don't care about being monitored by CCTV because they believe that so long as you keep your head down you'll be fine – and that any respectable person is going to keep their head down anyway.
You'll also find a lot of people here just dislike the act of protest in general. Again, I think it's because protest involves drawing attention to yourself which a large percentage of people here dislike on an instinctive level. So you find even the most agreeable protests seem to receive some level of pushback and shame which I think bleeds into our attitude towards policing. That said, I don't know what it's like in other countries. I just get the sense that the UK has a much more conformist attitude which enables the state to take a more authoritarian approach to policing protest here.
As an example, I'm not an anti-monarch but I was extremely angry about how the police handled anti-monarch protestors during the coronation. Yet when I've spoken to people about this over the weekend, most people have expressed to me that it was rude for there to be protestors at the coronation... But that's the point of protest!! Still, this doesn't change the fact that the act of protest is largely incompatible with our otherwise polite and conformist culture.