A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports on North Africa: an Army Group Africa report for March 19, stating that the 5th Panzer Army is making good progress in the northern sector; tank returns for Army Group Africa for March 19; that British forces totalling over 3000 vehicles and tanks are heading north with forward elements south-east of Dj Melab; of the Tunis Air Corps' aircraft availability as at March 20; that the Panzer Grenadier Regiment Africa was introduced as a stiffener into the main defence line of the Italian Young Fascists' Division and the main weight of the German heavy flak\batteries was positioned to the rear of the main defence area behind the Italian Trieste and Young Fascists' Divisions, on March 19; that artillery ammunition is required as the British are now more sensitive to artillery fire than before; a 5th Panzer Army report of March 13 on the capture of Churchill tanks; an appreciation by General Messe, Commanding General of the 1st Italian Army, on March 19 of an impending large-scale attack by the 8th Army, expected in 3-4 days' time, in which he doubts his ability to defend the Mareth line unless suitable reinforcements are available; on the Mediterranean: that the Germans suspect sabotage to signals cables in Sardinia, on March 19; and on the Russian Front: a situation report for March 20, noting German advances north of Kharkov.