Thnx for the response
I've been to Liverpool once and I too thought it was a great city with an extremely nice atmosphere and hospitable and friendly people. Never felt threatened and I don't think that as a tourist you will have a big chance of being a victim of violent crime. 'Safe' however doesn't necessarily mean 'crime free'. Because there are lots of safe European cities where there's easily as much organized crime as in a big American city ( London, Amsterdam, Berlin, Palermo,...all come to mind).
I've researched all about Cocky Warren. He indeed seemed to be a very clever guy. I also did some search on other Liverpool gangland figures like Steven French, the Bromley family, Colin Smith, etc...
There's something about British organized crime that fascinates me. I have yet to find the exact reason for that