I gotta say that I didn't feel very safe on night buses in London, despite the cameras. Besides Brussels, London is the only other city in which I've occasionally felt like I was in danger. It's still a fun city, to be clear, and it probably helps that it isn't a 24/7 city so that you don't end up in weird situations at night too much.

In the end the CCTV doesn't actually prevent anything from happening ...