Without the Washington Naval Treaty, would the Royal Navy have shifted from battleships toward battlecruisers?
Short answerIt would certainly have continued building battlecruisers for a time, with Renown, the Admiral class, and G3 forming three successive fast-capital-ship classes.
NotesBattlecruiser construction would have continued at least through the immediate postwar sequence. Renown and Repulse were followed by the Admiral class, and G3 was the next ordered fast-capital-ship design. Three successive classes show that the Royal Navy had not accepted the simple claim that Jutland made the type obsolete. The answer does not mean Britain would abandon battleships, because the G3 program is also paired here with the heavily armed N3. It instead identifies the fast ship as a continuing and deliberate part of a mixed capital-ship force.