There is, though, the recognition that the drafting of legislation evolves over time, and that a particular philosophy, if you want to call it that, such as you're describing may have been popular or acceptable, but because of incidents, because of experience, Parliament may decide that they want to start being more specific, without necessarily going back and redoing every act there is, but providing that additional certainty as they deal with new legislation.
On May 16th, 2007. See this statement in context.