On 12 February 1942 "Euryalus" was part of Vian's Force B deployed to cover Convoy MW 9, with HMS "Naiad", and eight destroyers. The convoy came under heavy German air attack on 14 February, and the merchant ship "Clan Chattan" was scuttled. Vian's ships returned to Alexandria on the morning of 15 February. On 22 March 1942 she was involved in the Second Battle of Sirte. From 12 to 16 June 1942 "Euryalus" was part of Operation Vigorous, another Malta supply convoy, starting at Alexandria, Port Said and Haifa. The escorting force included the old battleship HMS Centurion, the cruisers (flagship of Rear-Admiral Vian), HMS "Dido", HMS "Hermione", HMS "Euryalus", , (flagship of Rear-Admiral W. G. Tennant), , the anti-air cruiser , 19 destroyers, 9 escort destroyers, 4 corvettes, 2 minesweepers, 2 tugs and 4 motor torpedo boats. On 16 June HMS "Hermione" was sunk by the U-boat "U-205".