Billy Liar- would be serial killer!
The most alarming thing about Billy now, looking back at the film, is that, viewing his many violent fantasies about gunning down those who anger him, he may well have ended up a serial killer! He is strongly introverted and repressed with a strong fantasy life. Whose to say how his life may have gone by the late 70's?
Sadly, the streets of London are cluttered with alcoholic and drug-addled travesties of those who followed Billy's path to the smoke. London's anti-social nature tends to conspire against would-be Billy's. I tend to think that Julie Christie's character was a prick-teaser anyway.