Britain remains a postwar naval superpower

What if Britain retained its naval-superpower position from World War II to the present?

Britain would carry much more Atlantic and Mediterranean responsibility, freeing the United States to concentrate earlier on the Pacific.

A Royal Navy comparable to its interwar position would let the United States concentrate much earlier on the Pacific. Britain could take the lead in the Atlantic, Mediterranean, and Gulf, with the two navies remaining roughly comparable in size. Maintaining that position would require Britain to retain an economic resource base on the scale stipulated in the question. An early lead in microchip manufacture would need supporting infrastructure to become a lasting industrial advantage. Consistent investment in infrastructure and industry is therefore part of the proposed explanation for sustaining naval power.