Operation Portcullis was the dispatch of Convoy MW 14 to Malta from Port Said. The convoy followed the success of Operation Stoneage which had raised the Siege of Malta. Four merchant ships were escorted to Malta by seven destroyers of the 12th Destroyer Flotilla, supported by three cruisers of the 15th Cruiser Squadron and three destroyers from Alexandria. The convoy was met by Force K from Malta with two cruisers and four destroyers. MW 14 was not attacked by Axis forces en route or while unloading which was complete by 9 December. Lack opposition led to the sailing of pairs of ships to Malta with ordinary western desert convoys as far as Benghazi, where they would rendezvous with escorts from Malta and be guarded by Force K against a sortie by Italian ships from Taranto.
Background
Malta
In the Autumn of 1942, the British regained control of the central Mediterranean, through the combined effects of the survival of Malta, brought about by the success of convoy operations Pedestal and Stoneage, the Second Battle of Alamein in Egypt and Operation Torch the Allied invasion of French North Africa. Offensive operations from Malta had been resumed with the supplies delivered by Pedestal and intensified with those of Stoneage. Axis shipping losses contributed to the chronic fuel shortage that constrained Panzerarmee Afrika and limited it to delaying actions back to the Tunisian border. With the revival of Malta as an offensive base after the arrival of the Stoneage convoy, the short journey by Axis ships from Italy to Tunis and Tripoli became much more hazardous. Allied submarines sank 14 Italian ships in October and in November the air anti-shipping offensive had similar success, sinking 21 ships. The fast Abdiel class minelayer sailed from Alexandria on 10 November and arrived on 12 November with powdered milk, cereals and meat, leaving for Gibraltar that day to collect mines and lay them off Cape Bon. detached from a convoy bringing supplies to North Africa for Operation Torch and arrived on 18 November. Force K was re-established at Malta on 27 November with the cruisers, and of the 15thCruiser Squadron and four ships of the 14th Destroyer Flotilla, taken from the Stoneage convoy escorts. Force Q, the 12th Cruiser Squadron with,, Dido and with four destroyers moved to Bône on 30 November.
North Africa
As the Panzerarmee retreated, the Axis air forces had to leapfrog backwards from airfield to airfield. The Desert Air Force swiftly took over abandoned airfields and the landing grounds at Gazala were open by 17 November and Martuba, near Derna, was operational on 19 November; the Navy began scheduled convoys to Benghazi on 26 November. Ultra intercepts of Axis Enigma machine cyphers revealed that on 24 November, the Panzerarmee had only a few days' fuel left and on 3 December, that Italian troops were withdrawing to Buerat. By the middle of November the Panzerarmee Afrika retreat from Alamein had reached El Agheila. The front was wide and had to be held with a military force that was a shadow of the Axis force that had been in Egypt that October. The front settled while the British built up their supplies for an attack and the Axis forces tried to get supplies to the Panzerarmee across the Mediterranean.
Prelude
Axis command
The Axis command structure in the Mediterranean was centralised at the top and fragmented below. Benito Mussolini had monopolised authority over the Italian armed forces since 1933 by taking the offices of Minister of War, Minister of the Navy and Minister of the Air Force. FeldmarschallAlbert Kesselring of the Luftwaffe commanded German ground forces in the theatre as Commander-in-Chief South but had no authority over Axis operations in North Africa or the organisation of convoys to Libya. Fliegerkorps II and Fliegerkorps X were subordinate to the usual Luftwaffe chain of command. Since November 1941, Kesselring had exercised some influence over the conduct of the German naval operations in the Mediterranean as the nominal head of Naval Command Italy but this was subordinate to the Kriegsmarine chain of command. German service rivalries obstructed co-operation and there was little unity of effort between German and the Italian forces in the Mediterranean. Kesselring had the authority only to co-ordinate plans for combined operations by German and Italian forces and some influence on the use of the Regia Aeronautica for the protection of convoys to North Africa. The Italian Navy resisted all German attempts to integrate its operations; ships in different squadrons never trained together and Supermarina constantly over-ruled subordinate commanders.
Convoy plan
Convoy MW 14 consisted of the Agwimonte, Alcoa Prospector, Suffolk and Glenartney which had a naval crew. A continuous escort was provided by seven Hunt-class destroyers of the 12th Destroyer Flotilla, comprising,,,,, and the Greek after the tanker Yoruba Linda joined from Benghazi with its two escorts. The next day, the 6-inch cruiser with the destroyers, and were to join from Alexandria. When south-west of Crete, the convoy was to be met by the 5.25-inch cruisers Dido and Euryalus, with the fleet destroyers,,, of Force K from Malta.
Convoy MW 14
During the evening of 1 December, convoy MW 14 departed Port Said and on 2 December, rendezvoused with the tanker Yorba Linda and two Hunt-class destroyers. Next day, the cruiser Orion and three destroyers arrived from Alexandria and on 4 December, when south-west of Crete, the convoy was joined by Force K, comprising two cruisers and four destroyers from Malta. The convoy steamed for Malta at, receiving only a few ineffectual attacks from Axis torpedo-bombers. The convoy reached Grand Harbour early on 5 December and received the customary welcome from the populace and garrison. As the swift unloading of the ships began, congestion in the harbour was relieved by Operation MH 2, the dispatch of Convoy ME 11 on 7 December, containing Yoruba Linda from MW 14 and eight ships from Pedestal and Stoneage. By 9 December the ships were unloaded.
Aftermath
Analysis
Stoneage and Portcullis delivered of cargo, not including fuel oils; once the Portcullis ships had unloaded, enough flour was on the island to last until May 1943, food and fodder were sufficient until March and cooking fuels until April, even after some small ration increases. The success of Portcullis led to the institution of the Quadrangle operations, regular voyages by pairs of ships accompanying ordinary west-bound convoys supplying the Eighth Army in its advance from El Agheila to Tunisia. The ships would be met off Benghazi by escorts from Malta and sail northwards to Malta, protected by the 15th Cruiser Squadron from a possible sortie by the Italian fleet at Taranto.
