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
Sheppey Light Railway remote Hundred of Hoo branch on the other side of the Medway estuary. A further six were acquired in 1906 for use on other lightly used services. The railmotors remained in use until the outbreak of World War I. The steam engine components were scrapped but the carriage portions were united in pairs, coupled over a shared bogie, and in this format they remained in use on Sheppey, hauled by normal steam engines, until the line's closure. As the steam railmotors did not have enough power to pull goods wagons, the SE&CR sought out a small engine for the daily