The document outlines the different age ratings used in the British Board of Film Classification (BBFC) system. A U rating means a film is suitable for all ages, while a PG rating means some scenes may not be suitable for young children. 12A and 12 ratings indicate that films are suitable for those aged 12 and over, with 12A requiring accompaniment by an adult for younger viewers. 15 and 18 ratings specify the minimum age to view without an accompanying adult. The R18 category is legally restricted to explicit material involving consenting adults that can only be viewed in licensed establishments.