Looking for a movie about a coven or cult in a small town. In this film the main character, a man, returns to the town he grew up in upon hearing about an incident. When he returns he uncovers weird events and investigates. He discovers the town has a cult that has been sacrificing people and in particular members of his bloodline. There is a catch with the sacrifices in that it can not be the last member of the blood line, they must first make sure there will be a child to continue the line. One scene I remember is the main character being tied down and the cult making sure the bloodline is continued, another scene is where a friend of the main character tries to warn him but the leader of the cult finds out and kills her in her home. I would guess it’s a British film but not with any confidence.