River Thames shipping coming in and out of London, in 1732 it received the world's first lightship. This became a major landmark, and was used as an assembly point for shipping. Today it is marked by Sea Reach No. 1 Buoy. The River Thames contains over 80 islands ranging from the large estuarial marshlands of the Isle of Sheppey and Canvey Island to small tree-covered islets like Rose Isle in Oxfordshire and Headpile Eyot in Berkshire. They are found all the way from the Isle of Sheppey in Kent to Fiddler's Island in Oxfordshire. Some of the largest inland islands, for example
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