Where Britain obtained iron for naval steel

Where did Britain obtain the iron ore used for its iron and steel?

From domestic, Swedish, and imperial sources, with much of the material turned into naval steel in British foundries.

Britain drew iron ore from domestic sources, Sweden, and parts of the Commonwealth and Empire, then processed much of it in British steelworks. Specialist capacity remained strategically important because warships and submarines require grades of steel that the government could not safely allow to disappear.