I was under the impression it was a natural cave that had been converted and it had not been used after ww2 rather than it was built then.
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I was under the impression it was a natural cave that had been converted and it had not been used after ww2 rather than it was built then.
IIRC I heard that when they were redoing the St James railway station they accidentally tunnelled through into a cavern that did not appear on any maps but turned out to be an under ground submarine...