Eden Lake
Starring Kelly Reilly, Michael Fassbender, Jack O'Connell, Finn Atkins, Thomas Turgoose, James Burrows, Lorraine Bruce, Jumayn Hunter, Shaun Dooley, Bronson Webb
Watch "Eden Lake" on Amazon Prime released in 2008. It's a horror and thriller movie, and has a rating of 6.7 out of 10 from Imdb which is usually fine for this kind of movie.