I have some sympathy with the hon. Gentleman's position. He will be aware that the framework of waste management has already brought about a big change and that there is now a financial incentive—with the regulatory framework and the fiscal incentives in relation to landfill tax—for developers to recycle building waste. A value is beginning to be attached to it. I have noticed that many waste companies have invested in grading machinery for separating the different categories of construction waste so that it can be re-used.

I think that there is a role for targets. The hon. Gentleman pre-empted what I was going to say: I am not sure that it is appropriate to put that role in primary legislation. We are working on the sustainable buildings code, for example, within which there is a target for homes built under the code to contain 10 per cent. of recycled materials. It is not quite relevant to what he was saying, but that is one way in which targets can be used.

Further details about the preparation and content of plans will be a matter for regulations, which will be brought before the House in due course. They will cover such matters as the application of the provision, what matters plans should cover, and how they should be constructed. I am not altogether sure that it would be appropriate to include targets in that material either, but I am willing to give some thought to it in preparing the regulations.