South Thames Estuary and Marshes are nationally scarce plants on dykes, and the diverse invertebra include nationally rare beetles, flies and true bugs. South Thames Estuary and Marshes South Thames Estuary and Marshes is a biological Site of Special Scientific Interest which stretches between Gravesend and the mouth of the River Medway in Kent. Part of it is a Nature Conservation Review site, Grade I, and part is a Royal Society for the Protection of Birds nature reserve. It is part of the Thames Estuary and Marshes Ramsar internationally important wetland site and Special Protection Area under the European Union Directive on the Conservation of
Canvey Island island's internal services via the town centre, and provides services to places such as Southend, Basildon and Bournes Green. Nibs buses run the 21C bus from Canvey to Hadleigh via Essex Way. Both bus companies provide services to Benfleet railway station, which is located close to Canvey Bridge, just north of the island. The railway station has a taxi rank. Train services are provided by c2c between London Fenchurch Street and Southend Central/Shoeburyness. Canvey Island has two comprehensive schools: the Cornelius Vermuyden School and Castle View School. Both were built in 2012 as replacements for the island's three ageing comprehensives,