This is the end report of a project commissioned as part of the National Heritage Protection Plan; produced by Fjordr Ltd for English Heritage. It characterises marine spatial planning methodology applied to the historic environment. The report reviews the character of the marine historic environment in the light of the conceptual framework of sustainable development and considers the different emphases that animate marine spatial planning. The report also looks in detail at the place of the historic environment in ecosystem-based management, ecological services and socio-economic assessment. The report goes on to present an extensive account of law and policy relating to the historic environment within marine spatial planning in different domains, from global international law to locally-based planning. The final part of the report seeks to provide practical guidance on how the historic environment is best addressed within marine spatial planning, taking into account in particular the wide scope of decision-taking by public authorities that is subject to marine plan policies, and the need for proactive policies that encompass all the guiding principles of sustainable development.