Age Rating

After visiting the official BBFC website and running our film through the official film age rating specifications it rates our film as a borderline age 12 filming almost a 15.

The official description for films of this rating is:

Violence
At 12A, moderate violence is allowed but it should not dwell on detail. There should be no emphasis on injuries or blood, but occasional gory moments may be permitted if they can be justified by their context (for example brief sight of bloody injury in a medical drama).

Language
The BBFC's Guidelines state that strong language (e.g. 'f***') may be passed at 12 or 12A, depending on the manner in which it is used, who is using the language, its frequency and any special contextual justification. Aggressive uses of strong language may result in a film or DVD being placed at the 15 category. There is some allowance for puns on strong language at this category.
There may be moderate language (e.g. uses of terms such as ‘bitch’ and ‘twat’ at 12 or 12A)

In the case of violence our film should technically be certificate 18 due to one particularly violent scene, however it is so brief that I believe our film should stay within the age 12 guidelines.]
UPDATE 

After reviewing our film and it's content we have realised that it is more in fact a 16. Our film contains violence, swearing, and scenes of threat.