Wanklyn moved "Upholder" back to the Marettimo area. On the afternoon of 22 August lookouts sighted three tankers under escort from three destroyers and a flying boat. Wanklyn targeted the lead ship as the aircraft moved off to the disengaged side of the convoy and the destroyer nearest to him was moving to cover the rear of the convoy. The tanker carried three large drums on its deck and was painted in mauve and khaki dazzle camouflage. Wanklyn ordered a full salvo. Two torpedoes struck the target, the "Lussin", which sank with heavy loss of life. Wanklyn noted that the destroyers dropped 43 depth charges in eight minutes, followed by a further 18. The tactics of the Italians were improving. At one point, "Upholder" was trapped in between two destroyers. Wanklyn believed they were saved because the Italians began their attack at excessive speeds causing them to overshoot by 200 yards. On 24 August Wanklyn attacked a convoy of ships which included six destroyers two cruisers and a . At three miles he could not catch the smaller ships but fired his last two torpedoes at a cruiser. The officers heard one explosion and claimed a cruiser damaged. The escort launched 32 depth charges, some of which came close to "Upholder".