Anecdotes

The werewolves were played by people in prosthetic suits with the exception of the legs, which were done as CGI in post-production.

Sean Pertwee also starred in the movie Dog Soldiers (2002), which also was about werewolves.

Sean Pertwee has only two and a half minutes of actual screen time.

Rosie Day did her own stunts.

Had it's world premiere at Fantasy Filmfest 2015.