Would early 1930s Royal Navy destroyers built to 2,000-3,000 tons have twin 4.7-inch guns?
Short answerVery likely: the displacement could support turreted dual-purpose twins, but designers would still balance armament against affordable escort numbers.
NotesA 2,000-3,000 ton destroyer could support turreted twin 4.7-inch mounts with dual-purpose potential. Four turrets are preferable to a larger number of exposed mounts because fields of fire and operational flexibility matter. The fleet-escort role still sets a limit: more capability cannot make the design too costly to build in useful quantity.