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They appear to be part of a water tank. I've found a 1954 OS map that describes buildings at that location as "tanks" -- a term also applied on the same map to the water tower itself. Earlier map...
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They appear to be part of a water tank. I've found a 1954 OS map that describes buildings at that location as "tanks" -- a term also applied on the same map to the water tower itself. Earlier map...