Scum is a fabulously gritty borstal drama revolving around troublemaker Carlin (Winstone) and his campaign to do his time quietly. The menacing staff and inmates of the Borstal (young offenders prison) are frighteningly realistic and the whole film has the feel of a fly-on-the-wall documentary. Sporadic violence comes with no warning and the rape scene in the greenhouse is one of the most harrowing I have seen on film (may be cut in some versions). Full marks to Alan Clarke and Ray Minton for this beauty.