After a long research on BBFC, the target audience for ChristMass Murder, in my opinion, should be 18+.
I also came to this conclusion after having made different researches such as looking at other films targeted 18+ such as Se7en and Saw that both contain an high amount violence. We plan to make this film with violence as strong as the films used as examples and after having checked the various targets definitions, the 18+ was the most appropriate. I was actually thinking that also a target 15 could be ok but after these researches I changed my mind given that film targeted 15 cannot dwell the infliction of pain and injury which something will likely happen in our film project.
18+ films can contain:
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 blood and gore
real sex (in some circumstances)
discriminatory language and behaviour
As stated by BBFC, which is what we (Impact Productions), had in mind while planning ChristMass Murder.