Frog Island, London

Frog Island formed the southeastern tip of the Hornchurch Marshes. The peninsula was owned by the Phoenix Timber company who operated a timber yard. In 1980, Rainham Creek was damned in works associated with the Thames Barrier.^[1] The course of the River Ingrebourne was diverted and culverted.^[2] This created a section of drained creek that was susceptible to pooling of stagnant water. Infilling of the creek took place up to 1988 and a road connection to Rainham was made over the infilling.^[3]

Frog Island is located to the west of the drained and partially infilled Rainham Creek. The River Ingrebourne discharges into the River Thames through a culvert and tidal sluice.^[4] There is a radar station located at the mouth of Rainham Creek, used to monitor shipping for the Thames Barrier.^[5]

The mechanical biological treatment of the East London Waste Authority, sited here, turns 50% of processed waste into refuse-derived fuel, and recovers metals and glass.^[6][7]

Part of Frog Island, also known as Phoenix Wharf, has safeguarded wharf status.^[8] The whole of Frog Island is included in the London Riverside Business Improvement District area.^[9]

• Islands in the River Thames#List of former islands