London Stone is the name given to a number of boundary stones that stand beside the rivers Thames and Medway, which formerly marked the limits of jurisdiction of the City of London.
The London or 'Crow' Stone at Chalkwell, Southend, which formerly marked the seaward limit of the authority of the City of London.
Plaque on the Crow Stone, Chalkwell
London Stone, Yantlet Creek
Isle of Grain is a village and the easternmost point of the Hoo Peninsula within the district of Medway in Kent, south-east England. Once an island and now forming part of the peninsula, the area is a
London Stone (riparian)
…the Yantlet Line. On the south bank, the marker is the London Stone which stands at grid reference TQ860786 beside the mouth of Yantlet Creek on the Isle of Grain. The overall height of the monument is about 8 metres. The main column has an inscription, now illegible. The plinth on which it stands has an inscription…
The Grain Tower (constructed in 1855), and causeway seen at low tide 2008
Anti-tank obstacles on the beach at the Isle of Grain