What British gun choices reveal about postwar ambition

What do planned British battleship, battlecruiser, and cruiser gun calibers reveal about postwar naval ambitions?

They show a globally oriented fleet matching each ship category to different opponents and operational demands.

The proposed gun calibres follow the tasks and opponents expected for each type of ship. A 6-inch cruiser shell could still be handled by crew power, supporting reliability. A 9.2-inch weapon is treated as the largest useful rapid-firing cruiser gun. The 16.5-inch battlecruiser and 18-inch battleship proposals then seek the greatest practical striking power for the capital ships.