Would older British battleships be rearmed to match an F3 battlecruiser's guns?
Short answerProbably, because an updated 15-inch gun in production would make fleet-wide logistics and modernization easier.
NotesA completed F3 programme would place an updated 15-inch gun into regular production. That makes matching rebuilds of the Queen Elizabeth and R classes more plausible than preserving several incompatible arrangements. Common guns and ammunition would simplify training, spares, and wartime supply. One new class can reshape the economics of modernizing ships already in service.