Shot or Sand Blasting

Now Im not an expert on health and safety but I cant imagine that the law says its fine to do sandblasting out on the open without any form or ventalation or protection to the surround area. Well would you believe it but thats what A gray & sons do.

Sand blasting does create a lot of noise but more importantly when done out in the open it creates a lot of dust and other minute particlues that those using the surrounding are have no choice but to breath in. How can this be safe!