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As amended in the Standing Committee, further considered.

Indeed, and might lead to other consequences. The provision suggests that the PDO mechanism does not actually work at present because, as my hon. Friend the Minister said, the general permitted development order and section 60 of the Town and Country Planning Act 1990 limit the scope of development orders in terms of the extent to which they may be mediated by"““the approval of the local planning authority with respect to the design or external appearance of the buildings””." The general permitted development order makes a number of points about the circumstances under which that may happen. For example, in local authorities generally, if a householder adds less than 15 per cent. to the curtilage of their property, that is not regarded as requiring planning permission. I am sure that the hon. Member for Christchurch (Mr. Chope) is well aware of that from discussions that he has had in his constituency. In addition, there is a range of other considerations that cause certain things that are not fundamental to the extension, or the change of the appearance of the property, to remain outside the planning regulations. If one thinks about it for a moment, that is a good thing because otherwise no one could do anything without being snowed under by the requirement to have planning permission, and local authorities could not operate because every time that someone put a porch on their house, or some such, they would have to apply for planning permission.