The document discusses film certificate ratings in the UK and which rating would be most suitable for the author's psychological thriller film. A 12A rating would allow the widest audience but may limit the level of psychological threat depicted. A 15 rating is regularly used for thriller films and allows stronger violence, language, drug use, nudity and sexual violence if brief. This is the most suitable rating for the author's film. An 18 rating significantly limits the potential audience and includes elements like strong horror, blood, and gore that are not needed for the author's film.