Abbey River Tideway where there are two larger islands. It is much smaller than Canvey Island and the Isle of Sheppey and narrowly ahead of Andersey Island facing Abingdon-on-Thames, another market town with an abbey which had multiple medieval mills, another of note being Westminster Abbey, the island of which Thorney Island no longer exists. The outfall of the Abbey River is 400 m above Chertsey Bridge, into the weir pool of Chertsey Weir. The manmade strictly-considered "island" the bypass channel forms is outranked in size since the 2002 completion of the Jubilee River by the example containing Dorney and Eton, Berkshire.
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