Ninety years after this documentary was made, Barrow-in-Furness is still home to the construction of the Royal Navy's nuclear submarines, but back in the days before the second world war it was a town of some 60,000 people. Many of them were responsible for the building of tens of thousands of tons of industrial and military shipping and this film shows us some of the panoply of skills involved in pressing, welding, hammering and moulding molten hot metal into the keel plates that form the basis of a manufacturing process that must have twenty jobs going on simultaneously if it has one - all…