Located in Great Baddow, the Chain Home Tower which helped provide early warning of Luftwaffe attacks during the Battle of Britain has been Grade II listed by the Department for Digital, Culture, Media and Sport (DCMS).
It is the only complete tower of its kind surviving in the British Isles.
The tower, one of five complete Chain Home masts still standing, was originally erected at RAF Canewdon in south-east Essex in 1937 and relocated to Great Baddow in 1956.
Daniel Black, a CSES member and contributor who campaigned for the tower to be listed, said: "This tower represents not only the innovation and brilliance of pre-war engineers and scientists but also the heritage of the local area."
The original article and more information can be found on the BBC news website, here.