Thames Estuary The new airport would be built on a man-made island in the estuary north of Minster-in-Sheppey There is also some discussion about the need for a Lower Thames Crossing in order to alleviate traffic congestion at Dartford. The Thames Estuary is the focal part of the 21st-century toponym, the "Thames Gateway", designated as one of the principal development areas in Southern England. The appellation Greater Thames Estuary applies to the coast and the low-lying lands bordering the estuary itself. These are characterised by the presence of mudflats, low-lying open beaches and salt marshes, namely the North Kent Marshes and the
Canvey Island Kaneweye, Kaneveye and Koneveye. By the 12th century, Essex and subsequently Canvey were in the possession of Henry de Essex who inherited the land from his grandfather, Swein, son of Robert fitz Wymarch. During the reign of Henry II (1154–1189) the land was confiscated from de Essex and redistributed among the King's favoured nobles. Shown on John Norden's 1594 map with the second word "insula" with the traditional middle "s", facing the 'Isle' of Grain rather than a Latinised "Sheppey insula" to the southeast, is a close eastern division which is perhaps the part which later almost wholly merged into