The document outlines the different film rating classifications used in the UK by the British Board of Film Classification (BBFC). It describes the intended audience for each rating - U (universal), PG (parental guidance), 12A/12, 15, and 18 - and provides some example movies that have received each rating. The R18 classification is also mentioned as a legally restricted category for explicit adult films that can only be shown in licensed cinemas or supplied through licensed sex shops to adults.