"Dido" had four turrets and a 4-inch gun similar to "Phoebe". The 4 in. and the machine guns were removed in the latter half of 1941 at Brooklyn Navy Yard, when the "Q" position 5.25 in. turret was shipped and five single 20 mm were fitted. In the early summer of 1943 three single 20 mm were exchanged for four twin 20 mm and the radar outfit was altered by the addition of Types 272, 282, 284 and 285. April 1944 lists show only eight 20 mm.