After the outbreak of the Second World War, Biggs was posted as commander of in 1940; he received the Distinguished Service Order (DSO) that year for his services in the Second Battle of Narvik, and was awarded a Bar to the DSO for his role in the evacuation of Greece the following year. He was also awarded the War Cross, 3rd Class from Greece and Poland's Cross of Valour in 1942. Biggs then served in the Battle of Crete, before being posted to the Admiralty as Deputy Naval Assistant to the Second Sea Lord (1942–44). He was promoted to captain in 1943, and commanded from 1944 (he was also Captain (D), 11th Destroyer Flotilla of the Eastern Fleet), serving in the Indian Ocean.