British industry could support distinct naval and RAF aircraft lines, much as it historically produced specialised carrier types alongside land aircraft.
The scenario turns the treaty's carrier limits toward a distinct 12,000-ton scout-carrier category, giving reconnaissance and spotting a durable place in force structure.
Hermes-derived scout carriers would accompany cruiser squadrons on distant stations, where their aircraft extend search and presence beyond a cruiser's visual horizon.
A common machinery plant with the County-class cruisers offers an obvious way to reduce cost without turning the scout carrier into an eight-inch-gun hybrid.
Repeated small-carrier construction could encourage earlier deck-edge lifts, but British experience in heavy seas makes openings near the hangar a serious survivability concern.
A larger scout-carrier force supports improved Ark Royal- or Illustrious-scale fleet carriers by producing more experienced officers, crews, and damage-control specialists.
A larger carrier programme creates more experience with launch equipment, but it does not bypass the existing progression from hydraulic accelerators toward steam catapults.
Successive scout carriers would probably shift from riveted toward welded construction, spreading experience that could also influence later fleet carriers.
American and Japanese design would respond to British carriers and treaty categories, but intelligence and doctrinal feedback make exact aircraft and ship changes unknowable.
A mature 12,000-ton scout-carrier hull could replace Unicorn's depot-carrier role or provide an alternative starting point for wartime light fleet carriers.
Australia could operate scout carriers, but their tonnage would come from the combined British and Dominion allowance rather than creating extra treaty capacity.
A navy with deeper aviation expertise is more likely to demand genuinely high-angle dual-purpose destroyer mounts and to understand the limits of pre-war exercise assumptions.
The treaty caps each scout carrier at 12,000 tons, so improvement comes through successive batches and internal design tradeoffs instead of unconstrained growth.
The smaller carriers give the Royal Navy a pre-war design and trained force for anti-submarine and convoy work, rather than creating escort carriers only after the war exposes the need.
Naval demand could raise standard engine power to an estimated 1,500-1,600 horsepower by 1938-1939 while preserving the practical requirements of TSR aircraft.
Keeping naval aviation continuously in-house could make 1939 aircraft the result of several development cycles, not the first serious generation after institutional recovery.
A larger naval air establishment makes satellite production in Ceylon, Australia, or Canada more plausible, improving fighter and spare-parts supply in the eastern theatres.
Earlier carrier cover would probably accelerate German interest in snorkels and underwater endurance, but it cannot instantly deliver mature new submarines.
More carrier aircraft and a deeper naval aviation establishment could turn Taranto into a far heavier blow, weakening Italian convoy protection and expanding British choices in the Mediterranean.