the minelayer . On 16 December, the four-ship Italian convoy, renamed M42, left Taranto, picking up escorts along the way. The close escort was provided by seven destroyers and a torpedo boat; by the time they reached Sicily they were also accompanied by a close cover force, comprising the battleship , three light cruisers and three destroyers. The distant covering force consisted of the battleships Littorio, and , two cruisers and 10 destroyers. Allied convoy The British planned to run supplies to Malta using the fast merchant ship Breconshire, covered by a force of cruisers and destroyers, while the destroyers from the Cape Bon engagement, would proceed to Alexandria from Malta covered by Force K and Force B from Malta on 15 December. The British force was depleted when the light cruiser was torpedoed and sunk by , just before midnight on 14 December. U-557 was accidentally sunk less than 48 hours later, by the Italian torpedo boat Orione. On 15 December, Breconshire sailed from Alexandria escorted by three cruisers and eight destroyers under Rear-Admiral Philip Vian in . On 16 December, the four destroyers of 4th Flotilla (Commander G. Stokes in ) left Malta, covered by Force K (Captain W. G. "Bill" Agnew in ), two cruisers and two destroyers. Thirty Italian warships were escorting four cargo ships. The two British groups were also at sea and steaming toward each other; the opposing forces were likely to cross each other's tracks east of Malta on 18 December. Battle On 17 December, an Italian reconnaissance aircraft spotted the British west-bound formation near Sidi Barrani, apparently proceeding from Alexandria to intercept the Italian convoy. The British convoy was shadowed by Axis aeroplanes and attacked during the afternoon but no hits were scored and Agnew and Stokes met the west-bound convoy. By late afternoon the Italian fleet was close by and spotter planes from the battleships had made contact with the British convoy, but the planes misidentified Breconshire as a battleship. At 17:42, the fleets sighted each other; Admiral Angelo Iachino—commander of the Italian forces—moved to intercept to defend his convoy. Vian also wished to avoid combat, so with the British giving ground and the Italians pursuing with caution, the British were easily able to avoid an engagement. Just after sunset, an air attack on the British ships caused them to return fire with their anti-aircraft guns, allowing the Italian naval force