A common calibre speeds proximity-fuze distribution

How would the 1943 arrival of proximity fuzes affect the alternate 4.7-inch fleet?

The 4.7-inch shell was large enough for a proximity fuze, and its wider fleet distribution would let the Royal Navy extend the new capability to more ships quickly.

A proximity fuze would fit the 4.7-inch projectile. The alternate fleet has standardized many destroyers and other ships on that calibre. Introducing the fuze would therefore upgrade a much broader installed battery than the historically less common 4.5-inch fit. The point concerns distribution and commonality rather than claiming that the fuze was available during the early-war examples.