If the Second London Naval Treaty had not set a 14-inch limit, what guns would the King George V class carry?
Short answerProbably nine 15- or 16-inch guns, with 15-inch weapons the most attractive option for logistical commonality across the fleet.
NotesThe treaty-driven twelve-gun concept proved too heavy and became the ten-gun historical arrangement. Without the 14-inch limit, Britain could choose nine 15-inch or nine 16-inch guns in triple turrets. A 15-inch design would align the new battleships with Britain's large existing capital-ship fleet and encourage common gun upgrades. That commonality would simplify ammunition, maintenance, and modernization compared with introducing another caliber.