The Maplin Sands are mudflats on the northern bank of the Thames estuary, off Foulness Island, near Southend-on-Sea in Essex, England, though they actually lie within the neighbouring borough of Rochford. They form a part of the Essex Estuaries Special Area of Conservation due to their value for nature conservation, with a large colony of dwarf eelgrass and associated animal communities.

Foulness Island is a closed island on the east coast of Essex in England, which is separated from the mainland by narrow creeks. In the 2001 census, the usually resident population of the civil parish was 212, living in the settlements of Churchend and Courtsend, at the north end of the island. The population reduced to 151 at the 2011 Census. The island had until recently a general store and post office. The George and Dragon pub in Churchend closed in 2007, while the church of St Mary the Virgin closed in May 2010. In 2019, the Southend Echo reported plans for the church to be converted into a five-bedroom home.