Cameron rejects decriminalising drugs
10 December 2012 Last updated at 22:32 GMT
The idea of a royal commission to consider decriminalising illegal drugs - as suggested by a group of MPs - has been ruled out by the prime minister.
In response to the report by the home affairs select committee, David Cameron said the current policy was working in Britain.
The committee highlighted Portugal's approach, where people found with drugs are not always prosecuted.
It also asked ministers to monitor cannabis legalisation elsewhere.
Mark Easton reports.