 She was laid down on 30 May 1944 as Job Number J11825 by Hall Russell at Aberdeen, launched on 16 November 1944, and completed on 12 July 1945 with the pennant number K606.Following sea trials "Bigbury Bay" was prepared for service with the British Pacific Fleet.Based at Hong Kong from December 1945, she carried out patrols of the Chinese coast, refitting at Sydney, Australia, in mid-1946, then taking part in exercises with ships of the United States Navy around Japan.