I couldn't find London's murder rate further back than 1990 for some reason, but for England, the murder rate is higher now than it's been since at least 1900.
We don't know if CCTV surveillance, gun bans, and silverware purchasing restrictions have had an effect reducing violent crime, but at the very least it hasn't been enough to counter the increase.
> Better social policy regarding education and alcohol would be the better solution.
I'm pretty skeptical that this would decrease violent crime and/or murders. Do you have any evidence for this?