Lower Horse of islands (five of which later re-clustered to form Canvey Island), that broke away from the English coastline in the medieval period. Lower Horse Lower Horse is a uninhabited island off the English coast, lying in the Thames Estuary between Canvey Island and Stanford-le-Hope, close to . Administratively it is part of Thurrock unitary authority; the border with its ceremonial county namely the administrative county of Essex runs between it and Canvey Island. Smaller than normal markings for an area of saltings (traditional, open air, sea salt extraction through drying) appear in the Ordnance Survey map of 1919, which confirms
Exe Estuary on the west shore is the village of Dawlish Warren with its sand spit extending across the mouth of the estuary. Above this there are fewer settlements on the west shore, with just the villages of Starcross and Cockwood, both adjoining the lower portion of the estuary. The River Clyst also feeds into the estuary, just below Topsham. The River Kenn feeds into the estuary near Kenton. The soil is alluvial, derived from Devonian, Carboniferous and Permian rocks. The estuary is a Special Protection Area and SSSI. It is also a Ramsar site. The Exe Estuary is a site of