Canvey Island barriers spanning Benfleet Creek to the north and East Haven Creek in the west. The drainage system consists of sewers, culverts, natural and artificial dykes and lakes which feed seven pumping stations and gravity sluices that discharge the water into the Thames and creeks. Four of the discharge sites are "high flow" stations capable of discharging 600 litres of water per second at any tide level. The levels within the system are managed by a further five "low flow" pumping stations. The Environment Agency's Thames Estuary 2100 flood defence plan includes Canvey Island as one site for alleviating the flood
Estuary English various rates "socially" into middle-class speech and "geographically" into other accents of southeastern England. The scholar Alan Cruttenden uses the term London Regional General British in preference to the popular term 'Estuary English'. The names listed above may be abbreviated: Some authors use different names for EE closer to Cockney (Popular London) and EE closer to Received Pronunciation (London Regional Standard or South-Eastern Regional Standard). Note that some other authors use the name Popular London to refer to Cockney itself. The boundary between Estuary English and Cockney is far from clearcut. Several writers have argued that Estuary English is not