Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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 contains a message from C to the Prime Minister (PM); and the following reports on the Italian Front: a 1st Parachute Division report for March 21, noting strong Allied attacks with superior infantry, and tanks with artillery support, being east and north of Cassino; a 1st Parachute Corps report for late on March 21, stating that the Allies are bringing up large quantities of ammunition and thus confirming preparations for renewed attacks; the 76th Panzer Corps reports the results of reconnaissance by the 715th Infantry Division (Dietrich), on March 21; the German Naval Harbourmaster at Stefano reports that repair of the rail line from Orbetello-Stefano is hopeless, on March 22; of a German Air Force (GAF) in the South East instruction for the salvaging of all crashed fighter aircraft to be given top salvage priority, on March 21; on Western Europe: of a German fighter unit's losses for one Allied aircraft shot down in the Brunswick area, on March 15; Naval Headlines, covering German torpedo boat movements in the Channel; the patrol line of the Thor and Hammer U-boat Groups in the North Atlantic; landing operations in the Adriatic; that a Japanese sub-chaser group is to be added to the Kuriles Defence Force in response to U.S. submarine activity; the Aikoku Maru being sunk at Truk by U.S. carrier-borne aircraft; and that U-boat U 168 due in Batavia is to be escorted in by a Japanese minesweeper; from the Turkish air attaché in London, describing German air raids on London, on March 16; from the French chargé in Sofia, regarding an Allied air raid on Sofia, on March 17; on Eastern Europe: of the Admiral for Black Sea Operations requesting information on the availability of a prepared defence line on the Soviet Union-Romania frontier, on March 20; a report from the 4th Air Fleet for March 22 summarising reconnaissance results for March 21, that Soviet tanks are heading south-west over the Dniester, of bridging preparations in the area south-east of Yampol to Mogilev, and of vehicles and infantry south of the Dniester heading south east; and a partial report from Army Group South for March 20, giving its intentions for March 21, to relieve Brody and clear the road from Brody to Leszniov, with the 42nd Army Corps to attack from the Mazayevo area to relieve Kovel; on South-eastern Europe: that 79 German aircraft are on Nisch airfield 80 miles north west of Sofia, on March 21, possibly connected to projected operations against Hungary and Bulgaria, with supporting evidence for this collated; a report from the Commander in Chief (CinC) for the South East (Army Group F) for March 5, that the Lueneburg was damaged in Piraeus dock by limpet mines; on fighting between the Chetniks and Communist guerrillas in Serbia; of a railway being sabotaged in Croatia, and guerrilla raids on Beocin; that elements of the 11th, 4th, 1st and 29th Communist Divisions are engaged in Bosnia; of U.S. commando operations on Hvar and on Vis; of indications of an Allied intention to make landings on the Croatian coast; of the German intention to reinforce Vis with a further 1,200 men; and of activity by Communist forces in the coastal sector from Split-Zara and near Sinj; a German intelligence Abwehr report from Lisbon commenting on British depression caused by reports of the withdrawal of U.S. troops for military operations in the Pacific only, forecasting no large-scale landings, and only small operations to tie-down German forces including the formation of a bridgehead in Southern France, on March 18; Portuguese Consulate reports from Sheffield and Brighton predict attacks are expected at the end of March or the beginning of April, in Holland and Belgium, north and south France, not Denmark, and noting troop movements in England towards the south coast, on March 18; and from the German Legation in Dublin, on March 18, detailing the effects of German air raids on London; that a British parachute unit stationed in Northern Ireland was ordered to Iceland; and indications that travel facilities after March 20 cannot be guaranteed.