Actor Matthew Perry says drug courts work
16 December 2013 Last updated at 23:55 GMT
How do we best deal with the consequences of drug addiction and break the cycle of offending?
Think-tank Policy Exchange is calling for more drugs courts - on which former addicts might sit as magistrates - in the UK and has met Justice Secretary Chris Grayling to discuss the idea.
They were joined by a delegation from the United States including former addict and actor, Matthew Perry.
He spoke to Newsnight along with journalist Peter Hitchens and Baroness Meacher, who chairs the UK All-Party Parliamentary Group on Drug Policy Reform.