'Of course I'm a f**king hooligan, you pr**k. I am a hooligan...there I've said it...I'm a hooligan. And, do you know why? Because that's my f**king job.'In 1995, a film called I.D., about an ambitious young copper who was sent undercover to track down the ‘generals’ of a football hooligan gang, achieved cult status for its sheer brutality and unsettling insight into the dark and often bloody side of the so-called beautiful game.The film was so shocking it...