'In summary: if I've learned anything, it's that I don't much care for mood-altering substances. But I'm not afraid of them either. With one exception.

It's perhaps the biggest threat to the nation's mental wellbeing, yet it's freely available on every street – for pennies. The dealers claim it expands the mind and bolsters the intellect: users experience an initial rush of emotion (often euphoria or rage), followed by what they believe is a state of enhanced awareness. Tragically this "awareness" is a delusion. As they grow increasingly detached from reality, heavy users often exhibit impaired decision-making abilities, becoming paranoid, agitated and quick to anger. In extreme cases they've even been known to form mobs and attack people. Technically it's called "a newspaper", although it's better known by one of its many "street names", such as "The Currant Bun" or "The Mail" or "The Grauniad".'

Read more: Newspapers Are the Biggest Threat to the Nation's Mental Wellbeing