Martin Barnes, chief executive of the charity DrugScope, said reclassifying crystal meth was a "sensible precautionary measure".

BBC: NEWS | UK | UK Politics | Crystal meth to be class A drug

The 2011 Street Drug Trends Survey by DrugScope, a drugs-information charity, which was released on November 16th, provides some details.

ECONOMIST: Drug use and abuse

Giving evidence are Crisis, Drugscope, Mind, and the Single Parent Action Network.

BBC: Week ahead in committees

Witnesses include: Crisis, Drugscope, Mind, and the Single Parent Action Network.

BBC: Week ahead in committees