Heavily armed British ships force every rival to answer

How would Britain's naval rivals react to battleships and battlecruisers carrying unusually large batteries of 13.5-inch guns?

Germany, the United States, and Japan would pursue stronger answers, while Italy would welcome another navy's move toward triple turrets.

The proposed British batteries would greatly increase salvo weight. Germany would need a new turret or another design response to remain competitive. Italy would welcome British adoption of triple mountings, while the United States would add guns to its own designs. Japan would likewise order a counter, turning the British change into a wider naval arms race.