Construction of the prototype  did not go ahead, but the plans were retained. The need for locally built 'all-rounder' vessels at the start of World War II saw the "Australian Minesweepers" (designated as such to hide their anti-submarine capability, but popularly referred to as "corvettes") approved in September 1939, with 60 constructed during the course of the war: 36 ordered by the RAN, 20 (including Ballarat) ordered by the British Admiralty but manned and commissioned as RAN vessels, and 4 for the Royal Indian Navy.
The decision not to proceed with the prototype construction led to the retention of the plans. The requirement for locally manufactured versatile warships at the start of World War II prompted the approval of "Australian Minesweepers" (codenamed to conceal their anti-submarine features, but popularly known as "corvettes") in September 1939, with a total of 60 vessels constructed during the conflict: 36 ordered by the RAN, 20 (including Ballarat) commissioned by the British Admiralty and manned by RAN personnel, and 4 for the Royal Indian Navy.