South Thames Estuary and Marshes are nationally scarce plants on dykes, and the diverse invertebra include nationally rare beetles, flies and true bugs. South Thames Estuary and Marshes South Thames Estuary and Marshes is a biological Site of Special Scientific Interest which stretches between Gravesend and the mouth of the River Medway in Kent. Part of it is a Nature Conservation Review site, Grade I, and part is a Royal Society for the Protection of Birds nature reserve. It is part of the Thames Estuary and Marshes Ramsar internationally important wetland site and Special Protection Area under the European Union Directive on the Conservation of
Canvey Lake been converted to a lake by the building of a sea wall. Wildlife includes mallards, moorhens and water voles. A shingle bank has been created and reed beds cut back. There is access from Denham Road Canvey Lake Canvey Lake is an 8.3 hectare Local Nature Reserve in Canvey Island in Essex. It is owned by Castle Point Borough Council and managed by the council together with Canvey Island Town Council. On 1 March 2010 Canvey Island Town Council signed a 99 year lease with Castle Point Borough Council to run the site with a committee of two councillor from