This short documentary looks at the remains of two anti-aircraft positions dating from as far back as the Great War. The first is a position located on a hilltop overlooking London, potentially used in the First World War. Due to the country's ill-preparation against the emergent threat of air raids, such permanent positions were incredibly rare, let alone in survival today. Not far away is a Bofors gun light AA platform; used in the Second World War but again a rare type of position owing that most LAA batteries were only temporary and consisted of earthworks.

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