Could Britain afford to buy enough Scandinavian ore and aluminium to deny them to Germany?
Short answerYes; Britain could combine its own resources with Dominion support and sympathetic American finance because denying Germany the material is strategically valuable.
NotesBuying Scandinavian output is a form of wartime economic warfare rather than ordinary peacetime trade. Britain could draw on Canada, India, and the other Dominions, while American financiers also have an incentive to limit Germany's ability to threaten the Atlantic world. Purchasing ore and aluminium is cheaper than fighting the tanks, aircraft, and warships those materials would otherwise create. The exact financing mechanism remains open, but access to money appears less restrictive than access to the resources themselves.