an Entity references as follows:
National nature reserves in England were established by English Nature, now Natural England, which manages them either directly or through non-governmental organisations such as the Royal Society for the Protection of Birds or the National Trust. There are 25 national nature reserves in Cumbria, including the large Moor House-Upper Teesdale reserve which is shared with County Durham. All national nature reserves include all or part of a named Site of Special Scientific Interest (SSSI). Moor House-Upper Teesdale is also a Biosphere reserve.