A larger inherited submarine fleet compounds interwar experience

How would Royal Navy submarine development change if it inherited all available prewar and wartime submarines outside a treaty system?

A larger fleet would generate more operating experience and likely more construction, with those lessons feeding into subsequent designs.

The counterfactual needs clearer assumptions about which submarines transfer and when. In general, a larger fleet would support more operations, produce more institutional experience, and encourage further construction. Those lessons would then shape the next design generation rather than leaving development unchanged.