...for the rest of us who've seen more than two werewolf films and want more from a movie than Gemma Atkinson in a short skirt, this is a failure on just about every level.
Firstly, did I miss the relevance of the title? At what point did the 13 hour issue come up? I can work out for myself it's a case of stay alive and wait for dawn as we saw in the vastly superior Dog Soldiers, but they might as well have called this Big Werewolf House since the actual title never came up in plot or conversation.
Secondly, I don't care this was low budget. I don't watch a film for effects. I watch it for script, story and acting. This lacked a decent story, had a predictable script and pretty poor acting. Plus various gaps in realism and logic. Witness the copper responding to a 999 call who stops at the scene of an abandoned car and then lets a civilian handle what is probably evidence of an incident from the car. Also not to forget said copper taking about a week to actually get to the house.
Thirdly, a note to the writer and director: atmosphere and acting are much more effective when making a horror film than spending half the film focusing on a blonde with big norks.
Lastly, you'll like this if you think Hollyoaks is well-acted and realistic. Otherwise, avoid.