Site of special scientific interest
A Site of Special Scientific Interest (SSSI) is a formal conservation designation for an area which is of particular interest because of its fauna, flora or geological or physiological features.
Local authorities are required to have policies within their local plan to protect SSSIs, and should a planning application be submitted either on or close to the site then the appropriate conversation body must be consulted.
Orginally established in the National Parks and Access to the Countryside Act 1949. SSSIs legal status was later updated in 2000 through the Countryside and Rights of Way Act. SSSIs are also covered in the Water Resources Act 1991.