On 20 March "Clan Campbell" again left Alexandria for Malta, this time as one of four cargo ships with Convoy MW 10. Rear Admiral Sir Philip Vian commanded its escort, which included four light cruisers, an anti-aircraft cruiser and 18 destroyers. The weather was initially thick and stormy, which helped to hide the ships from enemy reconnaissance, but it cleared while the ships were off Cyrenaica and they were seen by enemy aircraft.