We have rated our film as a 15, below is the criteria given by the BBFC for a 15 rating.
No one younger than 15 may see a ‘15’ film in a cinema. No one younger than 15 may rent or buy a ‘15’ rated video work.
Drug taking may be shown but the film as a whole must not promote or encourage drug misuse. The misuse of easily accessible and highly dangerous substances (for example, aerosols or solvents) is unlikely to be acceptable.
For the Horror side : Strong threat and menace are permitted unless sadistic or sexualised, Dangerous behaviour (for example, hanging, suicide and self-harming) should not dwell on detail which could be copied. Easily accessible weapons should not be glamorised.
The language used can be frequent use of strong language.
The acceptable use of violence may be strong but should not dwell on the infliction of pain or injury.
However The strongest gory images are unlikely to be acceptable. Strong sadistic or sexualised violence is also unlikely to be acceptable.