This document summarizes the British Board of Film Classification (BBFC) rating guidelines for various age ratings (U, PG, 12A, 15, 18) in terms of language, sexual content, violence, horror, and drug usage depictions allowed. It notes that mild language and violence are permitted for U and PG ratings, with increasing restrictions on strong language, sexual/nude content, violence and horror depictions for higher age ratings of 12A and 15. An 18 rating is specified as only for adult viewers and may contain very strong depictions of violence, language, sexual content and drug usage that do not promote or encourage misuse. A murder mystery film could potentially receive a PG, 12A or 15 rating depending