The book, “Doing Time” is actually still available. Amazingly, there are a few copies left. I hasten to add, Madam Deputy Speaker, that all proceeds go to charity.
The serious point is this: the right hon. Gentleman, who served in the previous Government with the right hon. Member for Delyn (Mr Hanson), will recall that in 2008, when he was the police and justice Minister, he was asked a specific question. I cannot, off the top of my head, quote Hansard, but he indicated that evidence from the Home Office and the Ministry of Justice showed that 20% of all people who took drugs in prison acquired the habit for the first time in prison.