The Ringwood West Line was a World War II defensive line in England, running south from the GHQ Line near Frome to the coast.[1]
The line followed natural and manmade barriers such as rivers and canals, and was strengthened by pillboxes, gun emplacements and anti tank obstacles. In the event of an actual invasion, it was planned mines would be laid and key crossing points such as bridges demolished.
References
Ringwood West Line Wikipedia(Text) CC BY-SA