The document outlines the UK film rating system, describing the criteria for each rating level from U to R18. Films rated U are suitable for audiences aged 4 and over, while PG means some scenes may be unsuitable for children under 8. Films rated 12A and 12 contain material not generally suitable for those under 12. Only those 15 and older can see a 15 rated film. 18 rated films are restricted to adults only, and R18 films containing explicit sexual content can only be viewed by adults in licensed establishments.