Lower Horse is an uninhabited island off the English coast, lying in the Thames Estuary between Canvey Island and Stanford-le-Hope, close to grid reference TQ760828. Consisting mainly of marshland it is part of the group of islands (five of which later re-clustered to form Canvey Island) that broke away from the English coastline in the medieval period.
Administratively it is part of Thurrock unitary authority; the border with Essex running between it and Canvey Island.
References
Lower Horse Wikipedia(Text) CC BY-SA