During 1917 Aphis was operated on the Danube, in support of military operations, based at Bucharest. She remained there until 1919. In 1927 she transferred to the China Squadron for service in the Yangtze Flotilla to support British shipping and nationals in China. The situation in China remained volatile and Aphis remained with the Yangtze Flotilla until June 1940 when she was redeployed to the Mediterranean Fleet at Alexandria. For the next three years, Aphis provided artillery support for the Army. For example, in early December 1940, she bombarded Italian positions at Tobruk in company with her sister ships and and the monitor, and later that month, she bombarded harbour installations at Tobruk. This continued into February 1941, when she was joined by three Australian destroyers. Army support operations continued into April when Aphis bombarded enemy positions at Bomba and Gazala during the 8th Army's withdrawal. Aphis remained based at Alexandria until Malta became available for use as a naval base in March 1943. Based at Malta, nearer to the landings on the Italian islands and mainland Europe, she provided artillery support for the attack on Pantelleria in June (deployed with headquarters ship and destroyers and. Her planned deployment in support of the Sicily landings was cancelled in view of the class' vulnerability to air attack. Instead, after a period at Malta, Aphis supported British landings in Calabria in early September. She was deployed with her sister and monitors, and, to bombard enemy positions on the coast between Reggio Calabria and Pessaro before the Operation Baytown landings by the British XIII Corps. After another period at Malta, she participated in the support of the landings in the south of France, this time operating under United States command under Lt Commander Douglas Fairbanks Jr. She joined the Western Task Force, in June 1944, attached to the Special Operations Group at Ajaccio. The group was to mis-direct German resources by simulating large Allied landings and in mid-August they carried out bombardments between Antibes and the Var river. The operation was a complete success. A second diversionary operation took place off La Ciotat; Aphis and Scarab and the US destroyer bombarded the area. During the action, the allied ships were engaged by two German warships, the corvette UJ6082 and armed yachtUJ6083. Both German ships were sunk. In mid-August 1944, Aphis resumed duty with the Mediterranean Fleet and in September she was deployed in the Adriatic to support of Army operations, based at Ancona. She returned to Malta in January 1945. In July 1945, she left the Mediterranean to join the British Pacific Fleet at their forward base at Manus Island in the Admiralty Islands. By the time she arrived, Japan had surrendered and she did not join the fleet until after VJ Day. Subsequently, she was paid-off on arrival at Singapore and placed on the disposal list in 1946. She was sold for scrapping in May.
