A Royal Navy without pre-war weapon-development delays

What would the Royal Navy of 1939 look like without delays in weapons such as the quadruple six-inch and twin 4.5-inch mounts?

It would likely have more Edinburgh-type cruisers and far wider use of twin 4.5-inch dual-purpose weapons on destroyers and cruisers.

More Edinburgh-subclass Town cruisers could be under construction if their weapon systems matured on schedule. Twin 4.5-inch mounts could appear from the Tribal class onward and might be retrofitted to older C-class cruisers and other ships in place of four-inch weapons. That change would give cruisers a more capable dual-purpose secondary battery against both surface and air targets. A seemingly narrow ordnance delay therefore affects fleet composition, refit priorities, and the anti-aircraft performance available in early wartime battles.