In the United Kingdom, a national nature reserve is a form of statutory nature reserve that has been designated as such by one of the three national nature conservation bodies of Great Britain. There
Stodmarsh, a National Nature Reserve in Kent
In Scotland, national nature reserves are designated by NatureScot, and are areas of land or water designated under the Wildlife and Countryside Act 1981 as containing habitats and species of national
National nature reserve (United Kingdom)
…that has been designated as such by one of the three national nature conservation bodies of Great Britain. There are 229 designated sites in England, 43 in Scotland, and 76 in Wales. A similar designation, a "nature reserve", is used in Northern Ireland and those are designated by the Northern Ireland Environment…
St Abb's Head NNR in Berwickshire, seen from the south near the village of St Abbs.