 Complete the following phrase:  In June 1942, much of the Home Fleet was detached to the Mediterranean to take part in Operation Harpoon, an attempt to run one supply convoy to Malta from the west, while a second convoy headed to Malta from Egypt Operation Vigorous. Onslow was part of Force W, the covering force which also included the battleship , the aircraft carriers and and three cruisers. Force W joined the Harpoon convoy shortly after it entered the Mediterranean on 12 June, and remained with it until turning back, as planned, as the convoy reached the Strait of Sicily on the evening of 14 June. After her return to British waters, Onslow formed part of the distant escort for Arctic convoy 