Two Tree Island is a small island lying north-east of Canvey Island and south-west of Leigh-on-Sea in Essex, England. It covers 257 hectares and is connected to the mainland at Leigh by a single span bridge.
The island was reclaimed from the Thames Estuary in the 18th century and used as pasture until 1910 when a sewage works was built on it. From 1936, the entire island was used as a landfill site; this was later reduced to a single small site on the island in 1974. It is now a nature reserve, run by Essex Wildlife Trust, and the eastern half is part of the Leigh National Nature Reserve.
Wikipedia https://en.wikipedia.org/wiki/Two_Tree_Island
Coordinates 51°32'7.355" N 0°37'39.444" E