That is a fair point. I do not have a strong view. I do not see the harm in doing a cost-benefit analysis. It may well be that people wish to focus on the benefit part; I would not have a problem with that. But that is not my point. My point is that if we are passing legislation for a specific purpose, there should be a duty on the Government to review it at some point in the future; whether it is three years, as my hon. Friend the Member for Bury North suggests in his new clause, or whether it is a different time scale is a matter for debate, opinion and judgment. I would prefer to talk about the principle, which is that when the Government pass legislation and tell the House that its purpose is to do such-and-such and this is why it is important and so necessary, there should be a mechanism to see at a future date whether they were accurate in their analysis—whether it has done what it said. I know that Ronseal is a topical metaphor to use at the moment, but Governments should check more often whether the legislation does what it says on the tin. I see no great harm in that. I do not see why the Government should rail against it.
Oliver Colvile
Does my hon. Friend think that we could look at introducing sunset clauses into legislation much more readily, so that we can identify whether something has been successful? If it has not been successful, then get rid of it and start again.