What did the Royal Navy plan to replace its aging battlecruisers with?
Short answerFast battleships represented by Vanguard and related designs were the likely replacement path.
NotesVanguard and related fast-battleship thinking offered the practical replacement path. The aging battlecruisers combined capital-ship firepower with speed but belonged to an earlier design generation. A lighter, faster modern battleship was a more credible successor than another direct battlecruiser class. Vanguard's purpose therefore belongs to fleet renewal rather than an isolated late-war design exercise.