Structure plan
（重定向自Key diagram）
A structure plan was an old-style development plan required by United Kingdom planning law between 1968 and 2004. Structure plans set out strategic planning policies and formed the basis for detailed policies in local plans. Although no longer prepared, these plans continue to operate in many areas following the commencement of the new development plan system introduced by the Planning and Compulsory Purchase Act 2004, due to transitional provisions.