Isn't this also the site of the of the tin mines of the Carthaginians (Phoenicians) of the 8th century BC? I've read that the Carthaginians ran a shipping blockade at Gilbralter to protect the source (England) of their tin.
One of the most deep seated local legends is that Jesus was a nephew of Joseph of Arimethia. Joseph, presumed to be a brother of Mary, did own a major shipping fleet hauling tin to Palestine. Jesus supposedly sailed with his Uncle and visited the SW of England. I have seen stained glass windows in very old churchs in the area showing Jesus and Joseph in a boat, landing there. There are also songs or "chantys" sung by miners which recall those events.
There is no Biblical support for this legend that I am aware of, but we now know there were no technical reasons it could not have occured, and there is no Biblical indication that Jesus was engaged in carpentry (or anything else) for ~20 years after the age of 12.