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.
Dyfi Estuary Mudflats Dyfi Estuary Mudflats Dyfi Estuary Mudflats are mudflats on the estuary of the River Dyfi in Ceredigion, Wales, and are part of the Dyfi National Nature Reserve. The Dyfi Estuary is located on the conjunction of the counties of Ceredigion, Gwynedd and Powys. The area is designated a Special Protection Area (SPA), a protected site for wild birds under the EC Birds Directive. The area comprises the estuary and adjoining salt marsh and includes sandbanks, mudflats, peat bogs, river channels, meanders and creeks, with an extensive sand dune complex across the mouth of the estuary at Ynyslas. A large part