Thames Estuary

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 (640 acres) and is connected to the mainland at Leigh by a 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.

Leigh-on-Sea railway station is on the London, Tilbury and Southend Railway line, serving the town of Leigh-on-Sea, Essex. It is 32 miles 43 chains (52.4 km) down the main line from London Fenchurch Street via Basildon and it is situated between Benfleet to the west and Chalkwell to the east. Its three-letter station code is LES.

Belton Hills is a 22 hectare Local Nature Reserve in Leigh-on-Sea in Essex. It is owned and managed by Southend-on-Sea Borough Council.This steeply sloping site has large areas of scrub, and there are some rare plant and invertebrates species. Plants include Deptford pink (flowering June-August) and bithynian vetch (flowering May–June), and a survey in 2001 recorded 667 invertebrate taxa.