Seven Nelson-type battleships would reshape Mediterranean and Atlantic risks

What changes if Britain's slow battleships become Nelson-class ships when Italy enters the war?

Britain would field seven 16-inch-gun battleships, creating a much harder problem for Italian and German capital ships even though the Nelson design remained relatively slow.

Seven Nelson-type battleships would have a cumulative effect far beyond the historical pair of Nelson and Rodney. German ships such as the Scharnhorsts would face more opportunities to encounter superior 16-inch firepower. Italian Littorio-class battleships might still exploit range or favourable luck, but unreliable shell quality would make that wager dangerous. The larger force strengthens British coverage across multiple theatres without removing the Nelson design's limitations.