South Thames Estuary and Marshes 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 Wild Birds. Over 20,000 waterfowl use this site, and some species are present in internationally important numbers. There
Estuary English more widely spoken in parts of Sussex, Hampshire, Bedfordshire, Berkshire, Buckinghamshire and Middlesex as well. Estuary English shares many features with Cockney, and there is some debate among linguists as to where Cockney speech ends and Estuary English begins. The variety first came to public prominence in an article by David Rosewarne in the "Times Educational Supplement" in October 1984. Rosewarne argued that it may eventually replace Received Pronunciation in the southeast. Studies have indicated that Estuary English is not a single coherent form of English; rather, it has some of the phonetic features of working-class London speech spreading at