War redirects scientific and engineering effort from open-ended development toward implementing systems that are already understood. Three more years of peace would let British radar, stabilized gun mounts, and anti-aircraft work mature before that shift. Existing ships could also enter planned refits without the operational demands that kept them at sea historically. Heavy naval construction would put more money into research programmes during the same period. The later starting point changes what is ready for mass deployment when war finally begins.
Notable Point · 1:24:49-1:26:07
Peacetime lets research mature before implementation
A later war gives radar, stabilized mounts, and other projects more time to develop before wartime pressure shifts effort toward production and fielding.