Police to speak to South London Gang leaders to stop Killing. Drugs and “Land Rights” and acces known as post code wars have led to murder with gun, knives and thuggery. This has worked to an extent in Boston and Police want to try it. But why not arrest the ghang leaders as they sit on comfortable seats in Scotland Yard!? The debate continues. either way hopefully mindless deaths will reduce in South London and then the rest of Britain.