Higson wrote and directed the trailer himself, using pupils from Forest Hill School in south London. He said: “We took kids from the school who were keen on drama, and a bunch of zombies I got off the internet. I had no idea what their acting skills were going to be like but luckily once we got them on set the kids didn’t really have to act, because it was actually genuinely intimidating to have 30 blood-spattered zombies chasing you around.” The Telegraph Thursday 27 September 2012