On 11 July, the ship was assigned to escort Convoy WS.9C that consisted of merchantmen that were to pass into the Mediterranean to deliver troops and supplies to Malta. Once they passed Gibraltar, the escorts were designated as Force X and they were to be reinforced by Force H while in the Western Mediterranean. The ships entered the Mediterranean on the night of 20/21 July and they were attacked by Italian aircraft beginning on the morning of the 23rd. "Nelson" was not engaged and joined Force H later that day as the merchantmen and their escort continued onwards to Malta. The cruisers from Force X rejoined them two days later and the combined force arrived back in Gibraltar on 27 July. On 31 July–4 August, Force H provided distant cover to another convoy to Malta (Operation Style). Vice-Admiral James Somerville, commander of Force H, transferred his flag to "Nelson" on 8 August. Several weeks later, the ship participated in Operation Mincemeat, during which Force H escorted a minelayer to Livorno to lay its mines while s aircraft attacked Northern Sardinia as a diversion. On 13 September, Force H escorted "Ark Royal" and the aircraft carrier into the Western Mediterranean as they flew off 45 Hawker Hurricane fighters to Malta.