What changes if the British Isles lie about 200 kilometers farther west?
Short answerRulers may focus earlier on Ireland and island consolidation, while later European wars demand longer-ranged British aircraft.
NotesGeography constrains both state formation and modern war. With France farther away, Norman and Plantagenet rulers would have less incentive to build continental possessions and more reason to concentrate on Wales, Scotland, and especially Ireland. That could produce earlier political consolidation across the islands, although the altered North Sea, English Channel, and Gulf Stream would also change climate and maritime access. In the twentieth century, round-trip bombing missions to continental Europe would need roughly 400 additional kilometers of range. The counterfactual therefore links medieval priorities, Irish history, naval geography, and aircraft development rather than changing only the map.