What if Italy's cruisers became the specified World of Warships cruiser design and its battleships became copies of Roma in 1939?
Short answerBritain would urgently accelerate the Lion class and might withdraw major surface units from the Mediterranean in response to Italy's much stronger fleet.
NotesThe counterfactual replaces Italy's cruisers with a World of Warships design and every battleship with a copy of Roma. Even the older Cavour ships become modern battleships, producing a much more powerful Italian fleet. Germany's naval strength would look small beside it. Britain would move the Lion class much higher on its construction priorities and face strong pressure to maintain capital-ship building. The Royal Navy might also have to abandon the Mediterranean for major surface operations.