A panel of experts answer your questions about New Psychoactive Substances (NPS) or so-called 'legal highs'
https://www.youtube.com/watch?v=btV5QJhIrc8
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Dr Owen Bowden-Jones talks about 'new' drugs and results of the club drug clinic in London.
Former government drugs adviser Professor David Nutt tells BBC Newsnight that any drugs less harmful than alcohol (including Ecstasy and cannabis) should be decriminalised, and that a ban on Khat is c