Politicians need to face up to the fact that there is no rhyme or reason in the drug classification system.

You don't need to be a pharmacologist to realise that heroin is a lot more dangerous than magic mushrooms. Between 1993 and 2000 there was one death in the UK from magic mushrooms, but 5,700 from heroin. The government's Talk to Frank drug education website says: "Magic mushrooms are not addictive in any way."