 Complete the following phrase:  On 20 March the destroyer joined the escort for Convoy MW10 to Malta, with Carlisle and ships of the Fifth Destroyer Flotilla, which was covered by cruisers and destroyers of Mediterranean Fleet. On 22 March the convoy sustained dive bombing attacks, the whole movement done under threat of surface action with Italian heavy units including the battleship and three cruisers. Avon Vale sustained damage during these air attacks, and further damage was done after she was involved in a collision. The 