Having started working up on 3 June, she was assigned to serve with the 13th Destroyer Flotilla at Gibraltar. The working up was completed by 14 June and on 21 June she joined the destroyers , , , , , , , , , and in the Clyde as the escort for the joint convoys KMF-17 to Gibraltar and the military convoy WS-31 to the Middle East and India. "Arrow" was detached with the ships of KMF-17 on 26 June when the destroyer escort for WS-31 to Freetown arrived from Gibraltar. She then escorted the ships of KMF-17 to Gibraltar with the same destroyers and then joined the Flotilla on arrival. In July she was nominated for duty with Support Force East during the planned landings in Sicily. She took part in the landings on 10 July with the support force, and was then deployed to escort the follow-up convoys.