BBFC for my opening sequence

I have decided that my opening sequence would be rated 15 this is because you may see the following:

strong violence
strong language
sexual activity
drug taking
verbal violence

This means that this is only suitable for people aged 15 and above. It is illegal to supply a VHS, DVD, Blue-ray, UMD, video game, or film tickets with a 15 certificate to anyone under the BBFC certification allocated to that film.

After looking at existing horror films i decided that we would rate the opening sequence a 15 due to thats the type of horror sequence im completing therefore it is more representable and links better with other films i looked at.