The article fails to mention the treatment given to David Nutt by the last Labour government in 2009. At the time, he worked on the Advisory Council on the Misuse Of Drugs, which was meant to be independent of government. Based on their findings, Nutt pushed for the classification of illegal drugs based on actual harm, rather than arbitrarily as it still is now. The ACMD also published about the relative harmlessness of ecstasy and cannabis.
For this heinous crime he was sacked by the then Home Secretary, who said "he was asked to go because he cannot be both a government adviser and a campaigner against government policy."
Not long later, Cannabis was back to being a class B drug after only a few years at class C.
It seems that all governments are anti-scientific when the science contradicts their ridiculous ideologies, especially when it comes to drug policy.
An an aside, I remember the Prime Minister at the time, Gordon Brown, went on a morning talk show and said, with a straight face, that some strains of cannabis killed people.