It is based in Leicester, and is managed by a Council of Trustees which is elected by the members.
[2] It is a charity which covers all aspects of nature conservation, and works to protect wild places and wildlife.
[12] Nineteen are designated Sites of Special Scientific Interest, two are national nature reserves, one is a Ramsar internationally important wetland site, one is a Special Protection Area under the European Union Directive on the Conservation of Wild Birds, two are Nature Conservation Review sites, three contain Geological Conservation Review sites, one contains a scheduled monument, one is a local nature reserve and two are owned by the National Trust.
The largest is Rutland Water at 393 hectares (970 acres), a major wetland area which is one of the richest reservoirs for wintering wildfowl in the country.
[13] The smallest is Bloody Oaks Quarry at 1.3 hectares (3.2 acres), which has species-rich grassland on Jurassic limestone.