A record 57 new legal highs have been detected so far this year, with the EU’s early warning system reporting the appearance of more than one new psychoactive drug on the market every week.

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Photograph: Rex Features

Mephedrone, or ‘meow meow’, as popular as cocaine, drugs survey says

Photograph: Rex Features

Photograph: Rex Features

Mephedrone, the former legal high known as “meow meow”, is as popular as cocaine among teenagers and young adults, despite being banned last year. according to official figures published today.