Would Britain build a 40,000-ton battleship around spare 14-inch guns instead of HMS Vanguard?
Short answerSuch a ship would more likely replace a King George V-class design; Vanguard remained an additional fast battleship built quickly around already available 15-inch guns and turrets.
NotesA conventional two-forward, one-aft layout is plausible for the hypothetical design. Vanguard, however, existed to expand numbers without waiting for new guns and turrets, making her a rapid addition rather than the direct alternative to this class.