Regional colloquialisms (informal speech) are used in many books, this one is no different, and yet they are universally understood. Alfred Hitchcock once said, "If it's a good movie, the sound could go off and the audience would still have a perfectly clear idea of what was going on." The author, Stephen Richards, does infer some intelligence of the reader by not having to literally explain well known terms that are bandied about in newspapers, on TV and generally mimicked around the world. I mean, some people can't even spell the names of cities. Some will even spell Liverpool like so: Liverepool. Now what does that tell you of their intelligence?
That said, this is a story that will stand the test of time and can be understood worldwide for what happens to two people at odds with themselves, others and each other. Who wouldn't want to see two giant-sized men knock seven bells out of each other, and yet what we long for never happens. All sorts of violent interludes dispatch Viv Graham and Lee Duffy in different directions from each other, and yet they and their lives are intertwined like mature ivy is on a house end. I won't spoil it for you, as it is just warming up before it revs off the scale with shear, bloody-minded violence!