'The interpretation of a statute is far from academic exercise, it is directed to a particular statute, enacted at a particular time, to address (almost invariable) a particular problem or mischief. As was said in R (Quintavalle) v Secretary of State for Health (2003) 2 AC 687, 695 para 8: 'The courts task, within the permissible bounds of interpretation, is to give effect to Parliament's purpose. So, the controversial provisions should be read in the context of the statute as a whole, and the statute as a whole should be read in the historical context of the situation which led to its enactment.'