This document outlines the certification guidelines for different age ratings from the BBFC. It provides information on what types of content are acceptable and at what level of intensity for ratings of U, PG, 12A, 12, 15, 18, R18. Content addressed includes discrimination, drugs, horror, imitable behavior, language, nudity/sex, themes, and violence. The guidelines specify what increases in intensity of content is permitted at each rating level to ensure age-appropriate content for viewers of different ages.