The IWM Film Archive is the oldest film archive in the UK, holding over 20,000 hours of film, video and digital material and covering the two World Wars and all conflicts involving British or Commonwealth Forces since the start of the Twentieth Century to the present. Our collection also reflects aspects of civilian life in wartime, military life in peacetime, military exercises and operations.
This film is part of Free
Surrounded by water and manned to defend the coastline, sea forts were remote outposts of Britain’s home front.
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Sea forts were observation and gun fortifications used to help defend Britain during the Second World War. They were also temporary homes for the various crews that were stationed there. This short propaganda film glimpses their day-to-day lives aboard one of these unusual outposts, alongside the naval guns and searchlights, ready to scour the night sky for enemy aircraft.
Also known as Maunsell Forts, some of these unusual structures were mounted on long concrete legs, or even linked together by steel bridges. They were occupied by both British Army and Navy personnel and had two primary functions; to prevent aircraft from laying mines and to help defend against Luftwaffe bombing raids.