"Though nightmarish and visceral, it's the most intelligent horror film to have been made by a British director since Jack Clayton's The Innocents in 1960. And it fulfils the two purposes of horror: it involves you emotionally and it's frightening... It's a thoroughly credible set-up and the process of escalation whereby Jenny and Steve alienate, then anger these feral youths until they're ready to stab, torture and even burn them to death is worryingly authentic. Unlike most horror films, in which the heroes steer themselves into danger by their own stupidity, Jenny and Steve behave with complete plausibility and a tragically unrequited sense of kindness and social responsibility." - Chris Tookey, The Daily Mail