This document provides guidelines for the British Board of Film Classification (BBFC) on how to classify films, videos, trailers, advertisements and other media. It outlines the BBFC's guiding principles to protect children while allowing adult freedom of choice. It discusses general considerations like context, theme and tone. It also covers specific issues like language, nudity, sex, violence and more. For each issue, it provides guidance on the acceptable level for different age rating categories. The guidelines are regularly reviewed based on public consultation and research.