Why a much larger British fleet changes the Washington premise

How would completing a much larger British capital-ship programme affect the Washington treaty?

The proposed ships require abandoning the historical settlement, and including treaty-driven O3 battleships in that unrestricted programme creates another inconsistency.

Completing the proposed mix of very large battleships and battlecruisers would require abandoning the historical Washington settlement. The O3 design was itself a response to treaty constraints, so including it in an unrestricted programme creates another inconsistency. An agreement that permitted all those ships would regulate construction on different terms and could not be treated as the historical treaty.