What if Britain rejected the Washington Naval Treaty?

What could the other powers do if Britain refused the Washington Naval Treaty and continued its capital-ship program?

Not much immediately; Britain could keep building, while its rivals would struggle with budgets, industry, and the technical cost of matching larger guns and ships.

Britain's rejection of the treaty would leave the other powers with limited immediate means of coercion in this scenario. American construction still required congressional funding, while France and Italy faced their own financial constraints. Calling in British war debt could damage the lending relationship permanently and provoke pressure on Germany over reparations, affecting American investments there. The argument then combines treaty refusal with the earlier assumption of much faster and more heavily armed British battleships. A fleet centred on 28-knot ships with twelve 16.5-inch guns would force rivals to develop larger weapons and mountings. New infrastructure and competition for money with the army would add to the German response's difficulty. That enlarged fleet depends on the scenario's earlier design changes as well as the decision to reject the treaty.