The document discusses film certificate ratings in the UK and which 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. A 15 rating is regularly used for thriller films and allows for strong violence, language, drug use, nudity and sexual violence. This is identified as the most suitable rating. An 18 rating significantly limits the potential audience and the author's film does not require the level of graphic content that rating permits.