The data: The new figures indicate that there were 97 homicides in 2025, an 11% reduction on last year. That’s the lowest total recorded since 2014, and it comes despite the rise in the capital’s population. The capital’s homicide rate of 1.1 killings per 100,00 people makes it lower than any other UK city. It also makes London one of the safest cities in the Western world, with its rate significantly lower than Milan (1.6), New York (2.8), Berlin (3.2), Chicago (11.7) or Philadelphia (12.3).
And better air quality because of ULEZ and maybe 20mph zones (https://www.london.gov.uk/media-centre/mayors-press-releases/new-evidence-reveals-all-londoners-are-now-breathing-cleaner-air-following-first-year-expanded-ultra), another right wing complaint.
Problem is facts don’t seem to matter (see https://en.wikipedia.org/wiki/Vote_Leave_bus)