A National Nature Reserve (NNR) is the land declared under the National Parks and Access to the Countryside Act 1949 or Wildlife and Countryside Act (1981) as amended. The data does not include "proposed" sites. Boundaries are mapped against Ordnance Survey MasterMap Topography Layer.Full metadata can be viewed on [data.gov.uk](https://data.gov.uk/dataset/726484b0-d14e-44a3-9621-29e79fc47bfc/national-nature-reserves-england).