"London, the murder capital of the UK - want to brag about that?"
Err - isn't it obvious that London would have a higher murder total than anywhere else given the total population, including Greater London, is over 10m, with the next largest population, being Manchester, is just 2.7m.
Your statement is utterly bizarre. If Glasgow had a population of 10m, and London had Glasgow's population of 1.3m, then Glasgow would be the city with the highest total number of murders.