The Thames estuary is where the River Thames flows into the North Sea in south-east England. According to a hydrological study conducted between 1882 and 1889 it is believed that its western border lies around Canvey Island, along a north- south line between North Foreland in Kent and the Kentish Knock lighthouse at Harwich in Essex. The area is described by Conrad in the first pages of his novel “Heart of Darkness”, as both the departure point of the great British exploration and colonization ships as well as a site colonized by the Roman Empire in the British Isles. London Array, the world’s largest offshore wind farm, lies to the east in the outer Thames estuary. It produces 630 MW and is expected to produce enough clean energy to satisfy the demand of around half a million UK homes each year. Savings in C02 are estimated at around one million tons per year.