It is now well established that the scheduling of ancient monuments and the listing of historic buildings, valuable though they are for the most conspicuous sites, are insufficient to protect rural landscapes and historic town centres. Indeed, planning authorities regularly make the provision of prior archaeological investigation a condition for the granting of planning consent for developments, whether for roadworks, motorways or new buildings.Archaeological concerns are enabled and can be met by the application of environmental principles, which are codified in Article 191 of the Treaty on the Functioning of the European Union. These principles provide safeguards against adverse policy change and provide a basis for legal challenge