A high-rate six-inch rotary gun for Vickers in the 1930s

What would happen if Vickers-Armstrong received a viable high-angle six-inch rotary-gun design in the late 1930s?

It would produce extraordinarily powerful cruiser batteries able to overwhelm aircraft and mission-kill larger ships through sheer shell volume.

Delivering an actionable high-rate six-inch rotary-gun design to Vickers-Armstrong would create an immediately valuable industrial program. Town-class cruisers could carry eight weapons in four twin turrets, with enough volume of fire to threaten aircraft and surface ships alike. Even when the shells could not penetrate a heavily armored target, repeated hits could destroy rangefinders, directors, and other equipment above the armored deck. The result would be a weapon that wins by rapid mission kills as well as by sinking ordinary cruisers.