Description
Fort Knock John, Thames Estuary. WW2 sea based defence from Aerial attacks over London. Structure was the forerunner of the oil rig and latterly used for pirate radio broadcasts in the 1960's.
Fort Knock John, Thames Estuary. WW2 sea based defence from Aerial attacks over London. Structure was the forerunner of the oil rig and latterly used for pirate radio broadcasts in the 1960's.
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