‘Instead of going behind the bike sheds for a cigarette, kids are going behind the bike sheds for a ketamine hit.’ As far as warnings go, this from a psychologist who supports young addicts, is a pretty powerful one.

What makes Dr Lisa Ogilvie’s concerns all the more shocking is that a growing number of youngsters hooked on ket – a dissociative and anaesthetic drug commonly known as horse tranquiliser, which costs around £10 to £20 per gram – are still in school.

Working at the addiction and rehab charity Acorn in the North West of England, Dr Oligivie has helped to set up a ketamine support group.

Explaining the allure of the drug among young people, she tells Metro: ‘It is a quick cheap fix. Kids can do it in a lunch break at school and then potentially go back to a lesson, and the te

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