I shall come to that a little further on. The point made by the noble Lord about diamorphine, which is prescribed in this country, is perfectly fair. Interestingly, in some other countries it is not prescribed. There will be a difference of view. That is one reason why, from a government and policy point of view, it is important that we have the best possible scientific advice and give due regard to it. The advisory council is specifically charged with that under the Misuse of Drugs Act 1971; that categorisation is its view. Should there be derivatives—I shall answer my noble friend Lord Blencathra’s point on that in a minute—we have the Medicines and Healthcare Products Regulatory Agency, which can offer some advice as well. Beyond that, the National Institute for Health and Clinical Excellence can decide on the deployment.
That is not a case of policymakers passing the buck but of their basing policy on the evidence that comes before them. The Government’s position, based on the advice of the Advisory Council on the Misuse of Drugs, is that cannabis in its raw form is a harmful drug and its use should not be encouraged. The advisory council has reported that there is clear evidence that cannabis has a number of acute and chronic health effects, and that prolonged use can induce dependence. Even occasional use of the drug can pose significant dangers for people with mental-health problems.