Canvey Island the 30 hectares known as West Canvey marshes, acquired by the RSPB in 2007, and the Canvey Wick nature reserve. Canvey Wick is a designated Site of Special Scientific Interest (SSSI) at the site of the abandoned and incomplete oil refinery. The foundations of the 100 hectare (0.4 sq mile) site were prepared in the 1970s by laying thousands of tonnes of silt dredged from the Thames; the abandoned and undisturbed area has flourished as a haven for around 1,300 species of wildlife, many of which are endangered or were thought to be extinct; including the shrill carder bee, the
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