If Britain began carrier construction without the First World War, would its first ship be purpose-built or converted?
Short answerPurpose-built: HMS Hermes would probably appear earlier, then provide the evolutionary basis for later British carrier designs.
NotesThe absence of wartime construction removes Courageous, Glorious, and Furious as conversion candidates. Chile would also retain its ordered battleships. That makes a purpose-built HMS Hermes the natural first step. Continued development from an island-equipped Hermes could prevent the Royal Navy's historical experiment with islandless flight decks because pilots quickly use the island as a landing reference.