Battle of Calabria
In June 1940 she was transferred to the Mediterranean, where she was with the 7th Cruiser Squadron as John Tovey's flagship. She took part in the bombardment of Bardia, and the Battle of Calabria in July 1940. Late in that month, she sank the small Greek freighter "Ermioni" which was ferrying supplies to the Italian-held Dodecanese islands. During the rest of 1940 she escorted Malta convoys and transported troops to Greece. In the early part of 1941 she was in the Crete and Aegean areas and was also at the Battle of Cape Matapan in March 1941.