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Flat Holm Coastal and Anti-aircraft Defences is a post-medieval and modern defensive installation located on Flat Holm Island in the Bristol Channel. The site comprises coastal defence batteries and anti-aircraft gun positions established during the Second World War to protect shipping in the Bristol Channel and the port facilities of South Wales. The fortifications represent the layered defence strategy employed by British forces during the war, combining traditional coastal artillery with anti-aircraft weaponry to counter both naval and aerial threats. The physical remains include gun emplacements, observation posts, and associated structures that survive as testament to the island's strategic military importance during the conflict and the wider defence infrastructure of South Wales.
Flat Holm Coastal and Anti-aircraft Defences is a scheduled monument protected by Cadw under reference GM595. View the official record →
Flat Holm Coastal and Anti-aircraft Defences is a post-medieval and modern defensive installation located on Flat Holm Island in the Bristol Channel. It is designated a Scheduled Ancient Monument by Cadw under reference GM595.
Flat Holm Coastal and Anti-aircraft Defences dates from the post medieval/modern period, and is classified as a battery. It is one of over 32,000 scheduled monuments protected across the UK.
Flat Holm Coastal and Anti-aircraft Defences is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is GM595.
Several scheduled monuments lie within 10 km, including Three Palmerstonian Gun Batteries, Flat Holm (0.1 km), Flat Holm Victorian Rain Water Catchment (0.1 km), Flat Holm Victorian Rock Cut Defensive Ditch and Rampart (0.1 km).
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Research the area around Flat Holm Coastal and Anti-aircraft Defences