Scum (the screenplay) was originally banned in 1977 - the year it was made - on the instructions of the BBC who had commissioned it. This was on the grounds of it being both too realistic in its presentation and simultaneously a work of fiction. The film follows the progression of three boys at borstal (prison for males ages 11-16) from arrival to the social dominance of one of them. It's a blackly humorous and scathing study of the (physical *and* mental) violence inherent in any social system, and particularly in the 'justice' system.
The screenplay was remade as a feature film in 1979, starring most of the original cast and featuring most of the original script, although a couple of scenes (featuring sexual abuse, though physical and racial abuse were deemed acceptable...) were presumably cut from the script because they wouldn't pass even the BBFC censor.
The original screenplay has subsequently been shown on UK television once. I happened to have the video running. With a high-quality tape in it. Lucky, that! It compares very favourably to the film, though the film format appears inferior (lower budget at the BBC), the quality of the performances is possibly better.
Scum is one of the most important screenplays to have been made, and shown, on British television, because it reveals the changing attitudes of the censors, and the nature of political censorship in the UK.
The film itself does not reveal this history.
