More interwar cruisers expand imperial presence

What changes if Britain and the Dominions begin the 1920s with many more C-, D-, E-, and Town-class cruisers?

They gain far more worldwide presence and enter treaty and replacement planning from a much stronger numerical position.

Cruiser availability across stations matters more here than one decisive fleet battle. Doubling several classes gives the Royal Navy and Dominion navies more hulls for patrol, training, and showing the flag. Treaty negotiations would also begin from a larger existing inventory that other powers must recognize. Cruiser numbers mattered to a navy with global commitments even when individual ships were modest.