The historic cable station at Cuckmere Haven, East Sussex, overlooking the mouth of the River Cuckmere and the English Channel. Originally used for submarine telegraph cables connecting Britain with France, the building was adapted into a defensive pillbox during the Second World War. Following the German occupation of France in 1940, the cables were cut and the structure was modified with a strengthened roof and gun embrasures as part of Britain’s coastal anti-invasion defences. This unusual surviving building illustrates how existing civilian infrastructure was repurposed during the invasion emergency of 1940.