Dominion cruisers and treaty bargaining

What if Canada and other Dominions built County-class cruisers during the 1920s?

Their orders could lower shared costs, encourage Britain and other Dominions to build more, and give the empire a much larger cruiser baseline in treaty negotiations.

Canadian, Australian, Indian, and possibly New Zealand ships could join British construction. A combined force of roughly 30 large cruisers could support demands for about 400,000 tons in both heavy- and light-cruiser categories. Distributed imperial orders would change both unit cost and diplomatic leverage.