 As of August 2019, there are 37 sites designated in Greater London, 30 of which have been designated for their biological interest and 7 for their geological interest.Two sites are Special Protection Areas, three are Special Areas of Conservation, one is a Ramsar wetland site, two are National Nature Reserves, nine are Local Nature Reserves, seven are Geological Conservation Review sites, one is a Nature Conservation Review site, one is on the Register of Historic Parks and Gardens and one includes a Scheduled Monument.Three sites are managed by the London Wildlife Trust, two by the Essex Wildlife Trust, two by the Kent Wildlife Trust, one by the Herts and Middlesex Wildlife Trust, one by the Royal Society for the Protection of Birds and one by the Wildfowl & Wetlands Trust.