DD, Rocket2,
I think the Smokey Joe symbol on the map referred to the Norbord factory at South Molton. There was a thread here some years ago regarding the map, where I tried to get the Westbury cement works chimney added with no success. The Lafarge (ex Blue Circle) plant is now in mothballs, and probably wont re-open given the state of the construction industry. The site is still used as distribution centre for Lafarge products.
Edit : This is the
thread I was thinking of, there are also a couple more.