Commonwealth demand for Battle-class destroyers

What would large Battle-class allocations to Commonwealth navies imply?

They would require a very large production run, eventually pushing force planning toward Daring-class destroyers and their 4.5-inch armament.

The hypothetical allocation gives New Zealand twelve Battle-class destroyers and Australia and Canada sixteen each, creating a Commonwealth requirement of forty-four ships before Royal Navy orders are counted. Adding the Royal Navy's own forty-odd vessels would make this an exceptionally large production programme. Later construction would probably shift toward the Daring class once the 4.5-inch gun system was working satisfactorily. Allied allocations could enlarge an existing class and then accelerate the transition to its successor.