How much infrastructure expansion would a large Royal Navy and Commonwealth cruiser program require?
Short answerNone in principle; Britain had enough cruiser-building yards, provided the ships were funded.
NotesThe proposed program spreads a large cruiser order across the Royal Navy and several Dominion navies. Its scale does not mean Britain lacked the physical capacity to construct it. British yards already had ample capacity to build the ships without a major infrastructure expansion. Paying for the program and placing the orders would be the binding constraints.