Certificate for a Thriller: 18

18 Certificate
A Thriller film would be given the certificate of 18 if it contains:

• very strong violence
• frequent strong language (e.g 'f***') and/or very strong language (e.g ‘c***’)
• strong portrayals of sexual activity
• scenes of sexual violence
• strong horror
• strong blood and gore
• real sex (in some circumstances)
• discriminatory language and behavior

Although it is an 18 these kinds of films can have some scene cut out for the final edit for a number of reasons:

• where the material is in breach of the criminal law, or has been created through the commission of a criminal offence
• where material risks harm to individuals or, through their behaviour, to society – for example, any detailed portrayal of violent or dangerous acts, or of illegal drug use, which may cause harm to public health or morals. This may include portrayals of sexual violence which might, for example, make rape look appealing
• where there are more explicit images of sexual activity which cannot be justified by context. 

Films such as The Girl next Door Based on the Jack Ketchum novel of the same name,The Girl Next Door follows the unspeakable torture and abuses committed on a teenage girl in the care of her aunt...and the boys who witness and fail to report the crime.

This film was given an 18 as it shows scenes of strong violence, portrayals of sexual activity  blood gore and horror.