0097

File Title War Cabinet. Joint Intelligence Sub-Committee. Memoranda. May - July 1940. Papers Numbers. JIC 71-194. Volume VII
Reference CAB 81/97
Date 1 May 1940 - 31 July 1940
Government Department Cabinet Office
File Accession Date 1970

Description

A volume of reports, memoranda, and correspondence from the Joint Intelligence Sub-Committee (JIC). The JIC was formed of representatives from the intelligence services, the armed services, and the Foreign Office. Its purpose was to assess military, security, and foreign policy requirements and coordinate Britain’s intelligence organisations accordingly. The JIC members discussed a vast range of international and domestic issues in their meetings. In this file, subjects documented include the potential German invasion of the United Kingdom; defence against an invasion; reports on the military capabilities of Italy, Spain, and Portugal; possible German secret weapons, including chemical and biological weapons; early warnings of an invasion; evacuation plans and instructions to British civilians in the event of an invasion; propaganda and censorship arrangements; the security of British territory in Africa and the Middle East; and domestic security, including the monitoring of aliens and arrangements to counter an invasion by disguised enemy soldiers.

Document Title Date
i War Cabinet. Joint Intelligence Sub-Committee. Memoranda. May - July 1940. Papers Numbers. JIC 71-194. Volume VII 1 May 1940 Download PDF (2.35 MB)
iii Table of Contents 1 May 1940 Download PDF (8.26 MB)
71 Intelligence. Urgent Reports. Directive by the Chiefs of Staff Committee 17 May 1940 Download PDF (1.41 MB)
72 Portugal. Report 18 May 1940 Download PDF (2.95 MB)
73 United Kingdom. Invasion Of: - East Kent. Note by Director of Military Intelligence, War Office. Note by Secy. Covering: 17 May 1940 Download PDF (1.18 MB)
74 United Kingdom. Fifth Column Activities In: Note by Secretary 19 May 1940 Download PDF (754 KB)
75 Eire. Importance Of: Note by Secy. 20 May 1940 Download PDF (761 KB)
76 Topographical Intelligence. Report 30 May 1940 Download PDF (4.69 MB)
77 United Kingdom. German Invasion Of: Report 21 May 1940 Download PDF (2.68 MB)
78 Eire. Importance Of: Report 23 May 1940 Download PDF (4.46 MB)
79 United Kingdom. German Action Against: Note by J.I.C. Covering Report by Special Inter-Service Cttee. Appointed on Instructions of C.O.S. Possible New Weapons and New Methods of Warfare. - Appendix 'A' 24 May 1940 Download PDF (7.21 MB)
80 M.I.6 and the Ministry of Economic Warfare. Representation on the Joint Intelligence Sub-Committee. Note by Secy. 23 May 1940 Download PDF (691 KB)
81 Italian Situation. Report 24 May 1940 Download PDF (1.56 MB)
82 United Kingdom. German Invasion Of: Note by Secretary Circulating Conclusions of C.O.S.(40 146th Mtg., Instructing J.I.C. to Appreciate How Soon Invasion Possible 24 May 1940 Download PDF (1.31 MB)
83 United Kingdom. German Invasion Of: Report 25 May 1940 Download PDF (2.90 MB)
84 Invasion. Early Warning Of: Note by Secretary 25 May 1940 Download PDF (1.22 MB)
85 United Kingdom: German Invasion Of: Amendment to Paper No.J.I.C.(40)83 25 May 1940 Download PDF (1.44 MB)
86 Aliens. Employment of, By Officers. Memorandum 30 May 1940 Download PDF (770 KB)
87 British Troops and Germans Wearing British Uniforms. Provisions of Markings to Differentiate Between: Memorandum 29 May 1940 Download PDF (4.05 MB)
88 Invasion. Early Warning Of: Memorandum 30 May 1940 Download PDF (2.19 MB)
89 Italy. Possible Military Courses Open To: Memorandum 29 May 1940 Download PDF (2.19 MB)
90 German Expedition from Norway Directed Against the British Isles. Likelihood Of: Report 28 May 1940 Download PDF (1.53 MB)
91 Middle East Intelligence Centre. Letter (15.5.40) from Middle East Intelligence Centre to the Secy., Joint Intelligence Sub-Committee 29 May 1940 Download PDF (3.54 MB)
92 Leakage of Information. Note by the Chairman, Inter-Services Security Board 30 May 1940 Download PDF (1.12 MB)
93 Germany's next Move. Report 1 June 1940 Download PDF (3.79 MB)
94 German Invasion of the United Kingdom. Dissemination of Information to the Public. Memo. By the War Office. Examples of Subjects to be Covered by Pamphlet. (Appx. A). Hitler's Boast. "War Will be Carried into the Country of Our Arch-Enemy". (Appx. B). Hitler and the Civil Population. (Appx. C). Transport Difficulties of an Invader. (Appx. D) 31 May 1940 Download PDF (6.19 MB)
95 Leakage of Information. Memorandum 1 June 1940 Download PDF (1.34 MB)
96 Neutral Countries Which May Become Allies. Action Required In: Memo. By Director of Military Intelligence. Service Attaches. Raising the Status Of: Assistant Military Attaches. Appointment of, for Special Duties. "Shadow" Missions. Activities Which it is Desired to Promote 2 June 1940 Download PDF (1.37 MB)
97 Invasion. Note by Secy. 3 June 1940 Download PDF (676 KB)
98 Telegram from Iceland. Note by War Office 3 June 1940 Download PDF (986 KB)
99 Dominion Military Headquarters. Information To: Memo. By War Office 3 June 1940 Download PDF (783 KB)
100 Leakage of Information. Note by Secy. 4 June 1940 Download PDF (766 KB)
101 Summary of Likely Forms and Scales of Attack that Germany Could Bring to Bear on the British Isles in the near Furure. German Forces Available for an Attack on the British Isles. (Appendix A) 6 June 1940 Download PDF (8.08 MB)
102 German Mustard Gas Spray Attack on This Country. Possible Scale Of: Memo. By War Office 5 June 1940 Download PDF (2.32 MB)
103 Allied Military Committee. Co-Operation With: Memo. By Director of Military Intelligence 5 June 1940 Download PDF (858 KB)
104 Northern France. Mounting of Large Calibre German Guns. Letter Dated 4.6.40, from Director of Naval Intelligence to Secy., Joint Intelligence Sub-Committee 5 June 1940 Download PDF (723 KB)
105 Netherlands East Indies. Relationship With: Memo. By Director of Military Intelligence 5 June 1940 Download PDF (1.52 MB)
106 Government and Service Ministries. Evacuation in Event of Air Attack. Memo. By Inter-Services Security Board 5 June 1940 Download PDF (2.39 MB)
107 Bluff in Defence. Letter Date 6.6.40, from Chairman, Inter-Services Security Board to Secretary, Joint Intelligence Sub-Committee 7 June 1940 Download PDF (1.40 MB)
108 Telephone Conversations in the U.K. In Foreign Languages. Memo. By Inter-Services Security Board 7 June 1940 Download PDF (729 KB)
109 Home Defence Inter-Services Intelligence Section. Memo. 12 June 1940 Download PDF (782 KB)
110 Home Defence Inter-Service Intelligence Section. Note by Director of Military Intelligence 9 June 1940 Download PDF (1.22 MB)
111 Press Censorship. Note by Secy. 10 June 1940 Download PDF (1.43 MB)
112 Press Censorship. Report by J.I.C. 10 June 1940 Download PDF (3.25 MB)
113 Cyphers. British: Possible Possession by Germans. Extract from a Letter from the Director of Intelligence, Air Ministry to the Chairman, Joint Intelligence Sub-Cttee. 11 June 1940 Download PDF (1,003 KB)
114 Italian Embassy. Prohibition To, Of Use of Internal Telephone and Telegram Communications. Letter Dated 11.6.40, from Director of Naval Intelligence to the Secy., Joint Intelligence Sub-Cttee. 11 June 1940 Download PDF (706 KB)
115 German Offensive Action Based on Norway. Note by Secy. 12 June 1940 Download PDF (1.39 MB)
116 U.K. Seaborne and Airborne Attack On: Note by Secy. 12 June 1940 Download PDF (1.97 MB)
117 Canaries, Azores and Cape Verde Islands. Certain Activities. Note by Secy. 13 June 1940 Download PDF (736 KB)
118 Spain. Situation In: Note by Director of Military Intelligence 14 June 1940 Download PDF (1.47 MB)
119 Government and Service Ministries, Evacuation of, in the Event of Invasion (As Opposed to Air Attack). Report by Inter-Services Security Board 13 June 1940 Download PDF (1.62 MB)
120 Germany. Situation In: Preparation of Appreciation. Note by Secy. 14 June 1940 Download PDF (741 KB)
121 U.K. Seaborne and Airborne Attack On: Directive to C.-in-C., Home Forces 15 June 1940 Download PDF (4.60 MB)
122 Spain: Situation In. Report 14 June 1940 Download PDF (1.62 MB)
123 Evacuation from Towns on the South Coast. Note by Secy. 14 June 1940 Download PDF (785 KB)
124 Gliders. Use by Germany. Note by Director of Military Intelligence 15 June 1940 Download PDF (1.40 MB)
125 Evacuation from Towns on the South Coast 18 June 1940 Download PDF (2.08 MB)
126 Joint Intelligence Sub-Committee Reports, Etc: Procedure for Drafting: Note by Secy. Covering Memo. By Director of Military Intelligence 16 June 1940 Download PDF (1.24 MB)
127 Fifth Column. Letter from Mr. Cavendish Bentinck to Secy., J.I.C., Covering Letter from Mr. Cavendish Bentinck to Director of Military Intelligence, and Reply Thereto 17 June 1940 Download PDF (2.31 MB)
128 Home Security. Avoidance of Duplication. Note by Director of Military Intelligence 17 June 1940 Download PDF (664 KB)
129 Withdrawn 19.6.40 17 June 1940 Download PDF (552 KB)
130 Germany. Present Situation In: Report 20 June 1940 Download PDF (5.91 MB)
131 Canary, Azore and Cape Verde Islands. Certain Activities: Note by Secy. 18 June 1940 Download PDF (1.34 MB)
132 Straits Settlements. Japanese Invasion: Warning Of: Note by Secy. Covering Telegram from O.A.G., Straits Settlements (No. 159, 18.6.40) 19 June 1940 Download PDF (2.28 MB)
133 Italian Occupation of the Yemen and Further Advance to the Straits of Bab-El-Mandeb and Aden. Possibility Of: Note by Secy. Covering Note by Director of Military Intelligence and Material to Form the Basis for Discussion at a Drafting Committee 20 June 1940 Download PDF (5.39 MB)
134 Smoke. Use of, In an Invasion of Great Britain. Memo. By War Office 21 June 1940 Download PDF (1.47 MB)
135 Straits Settlements. Japanese Invasion: Warning Of: Report by J.I.C. 21 June 1940 Download PDF (740 KB)
136 Coastal Evacuation. Note by Secy. 22 June 1940 Download PDF (5.90 MB)
137 Yemen. Italian Occupation of, And Further Advance to Straits of Bab-El-Mandeb and Aden. Possibility Of: Report 25 June 1940 Download PDF (6.18 MB)
138 Coastal Evacuation. Report 24 June 1940 Download PDF (3.00 MB)
139 Porthcurno. Cable Landing Station At: Possibility of Attack: Note by Secy. Covering Memo. By War Office 25 June 1940 Download PDF (2.19 MB)
140 Smoke. Use in an Invasion of Great Britain. Report 5 July 1940 Download PDF (5.31 MB)
141 Yellow Fever. Possible Use of Rhesus Monkeys by the Germans, To Prepare a Vaccine, or in Connection with Offensive Measures. Note by Secy. 26 June 1940 Download PDF (1.40 MB)
142 Porthcurno. Cable Landing Station At: Likelihood of Attack, Also Probable Method and Scale of Attack. Report by J.I.C. 29 June 1940 Download PDF (3.13 MB)
143 Germany's next Move. Note by Secy. Covering Notes by Director of Military Intelligence, W.O., And F.O. Note by Admiral Bellairs. (Annex) 27 June 1940 Download PDF (4.86 MB)
144 Germany's Next Move. Report 2 July 1940 Download PDF (8.21 MB)
145 Foreign Service Personnel in the U.K. Note by Director of Military Intelligence 30 June 1940 Download PDF (1.55 MB)
146 Foreign Countries. Organisation of British Communities In: Note by Secy. Covering Draft Report Prepared by F.O. Report 30 June 1940 Download PDF (3.42 MB)
147 Gliders. Use by Germans. Report 5 July 1940 Download PDF (2.35 MB)
148 Intelligence Advanced Headquarters, G.H.Q., Home Forces. Supply of Intelligence. Note by Secy. 4 July 1940 Download PDF (2.21 MB)
149 Recognition, Identification, and Reporting of Enemy Personnel. Report 3 July 1940 Download PDF (3.97 MB)
150 Telegrams from Enemy Legations in Eire and from Neutral Embassies in Eire and the U.K. Note by Secy. Covering Memo. By Inter-Services Security Board 2 July 1940 Download PDF (1.87 MB)
151 French Missions and Committees at Present in the U.K. Security of Certain Written Information in the Hands Of: 3 July 1940 Download PDF (3.09 MB)
152 Great Britain. German Invasion: Imminence Of: Report Covering Available Evidence Of: 4 July 1940 Download PDF (2.88 MB)
153 "Inspired Rumours". Memo. By Inter-Services Security Board Covering Memo. By Mr. Ronald Turnbull, Former Press Attache to H.M. Legation, Copenhagen 5 July 1940 Download PDF (5.81 MB)
154 U.K. Invasion: Action Designed to Disconcert the Enemy in Relation To: Memo. By Inter-Services Security Board Covering Suggested Statement in House of Commons 5 July 1940 Download PDF (2.81 MB)
155 U.K. Seaborne and Airborne Attack On: Scales of Attack. Note by Secy. 7 July 1940 Download PDF (766 KB)
156 British and French West African Colonies. Security Note by Secy. 8 July 1940 Download PDF (1.59 MB)
157 Daily Summaries. Preparation Of: Procedure if Active Operations are Undertaken Against the British Isles. Memo. By Secy. 8 July 1940 Download PDF (2.71 MB)
158 Propaganda. British, In Time of War. Memo. By Director of Naval Intelligence 8 July 1940 Download PDF (3.00 MB)
159 Smoke. Use in an Invasion of Great Britain. Note by Secy. 9 July 1940 Download PDF (1.54 MB)
160 Air-Borne Tanks. Information Regarding: Memo. By Director of Military Intelligence 12 July 1940 Download PDF (945 KB)
161 West African Colonies. French and British: Scales of Attack from Northern Africa. Report 11 July 1940 Download PDF (14.40 MB)
162 Rumour as a Weapon. Memo. By Director of Naval Intelligence 10 July 1940 Download PDF (835 KB)
163 British Isles. Seaborne and Airborne Attack On: Scales of Attack: Report 16 July 1940 Download PDF (6.05 MB)
164 Rumours. Memo. By Inter-Services Security Board 11 July 1940 Download PDF (2.07 MB)
165 Security of Certain Operations. Memo. By Inter-Services Security Board 11 July 1940 Download PDF (2.92 MB)
166 Rumours. Dissemination of, As a Deterrent Against Attempted Invasion: Memo. By Director of Intelligence, Air Ministry 13 July 1940 Download PDF (1.95 MB)
167 British Communities Abroad. Draft Instructions to Officers Examining the Organisation Of: Draft Submitted by Foreign Office 18 July 1940 Download PDF (2.16 MB)
168 Weekly Report of Department E.H. For Week Ending 13th July 13 July 1940 Download PDF (4.25 MB)
169 Information. Sources Of: Memo. By Director of Military Intelligence, General Headquarters Home Forces 15 July 1940 Download PDF (3.81 MB)
170 British Communities. Organisation of, In Foreign Countries. Note by Secy. 16 July 1940 Download PDF (766 KB)
171 Comparison of the Effort Required for Screening Important Targets in Great Britain with that Involved in Throwing a Smoke Screen over the English Channel. Memo. By Meterological Office and Ministry of Home Security 16 July 1940 Download PDF (1.73 MB)
172 Smoke Clouds. Use in an Invasion of Great Britain. Memo. Prepared under the Direction of the Director of the Meterological Office 16 July 1940 Download PDF (4.00 MB)
173 Russian Policy. Note by Secy. 16 July 1940 Download PDF (615 KB)
174 Intelligence. Supply to G.H.Q., Home Forces. Report 23 July 1940 Download PDF (5.24 MB)
175 Officers Visiting British Communities in Neutral Countries. Instructions To: Memo. By War Office Covering: Practical Instructions to Inspectors and a Questionnaire. (Annex A) 17 July 1940 Download PDF (3.55 MB)
176 Para-Military Organisation in the Dominions, Colonies and Foreign Countries. Memo. By Director of Military Intelligence Informing, Committee of Progress in Formation. Suggested Paper for Submission to India Office with a View to Indian Authorities Taking Action in Countries Adjacent to India 17 July 1940 Download PDF (3.70 MB)
177 Secret Weapon. Memo. By Wing-Commander Darvall 18 July 1940 Download PDF (909 KB)
178 British Propaganda in Time of War. Memo. By the Joint Intelligence Sub-Committee 18 July 1940 Download PDF (5.29 MB)
179 Russian Policy. Draft Report Covering Notes on Main Lines of Soviet Foreign Policy and Military Aspects of Possible Russian Action Against Iran or Turkey 27 July 1940 Download PDF (4.98 MB)
180 Subversive Activities in Enemy and Conquered Territories. Memo. By Director of Military Intelligence, Covering Instructions and Questionnaire to Head of Different Bureaux Being Set up to Conduct: 18 July 1940 Download PDF (11.30 MB)
181 Battle for Britain. Memo. By Admiral Drax Giving His Views on German Method of Attack. Note by Secy. Covering Note by Director of Naval Intelligence Commenting On: (Annex) 18 July 1940 Download PDF (4.69 MB)
182 Sea and Land Raids. Note by Secy. Suggesting that the Press be Asked to Encourage Use of Word "Raid" as Opposed to "Invasion", When Referring to Any Possible Attack on the British Isles 20 July 1940 Download PDF (647 KB)
183 Information Regarding Naval and Shipping Movements in Algerian, Moroccan and South French Ports. Importance of Obtaining: Memo. By Director of Naval Intelligence Stressing: 20 July 1940 Download PDF (780 KB)
184 Intelligence. Supply from Enemy and Enemy Occupied Territories. Note by Secy. Covering Draft Paper for Submission to C.O.S. 20 July 1940 Download PDF (1.53 MB)
185 Invasion. Shipping For: Note by Secy. Covering Minute from Prime Minister Dated 20.7.40, and Statement by Admiralty Giving Estimate of German Merchant Shipping Used in First Month of Invasion of Norway 20 July 1940 Download PDF (1.46 MB)
186 Smoke. Use in an Invasion of Great Britain. Report by J.I.C. 20 July 1940 Download PDF (1.40 MB)
187 Portuguese Armed Forces. Note by Secy. Circulating Request of P.M. For Note on Strength, Dispositions Quality and Plans Of: 21 July 1940 Download PDF (748 KB)
188 Shipping. Amount Required to Sustain a German Invasion of the British Isles. Report by J.I.C. Covering Minute by Prime Minister Dated 20.7.40 26 July 1940 Download PDF (3.63 MB)
189 Propaganda and Rumour. Weekly Report of the Air Ministry Pursuant to Conclusion (4) of 50th Meeting of the J.I.C., Week Ending 20th July, 1940 22 July 1940 Download PDF (1.59 MB)
190 Copy of Weekly Report of Department E.H. For Week Ending 20th July, 1940. Note by Secy. Circulating: 22 July 1940 Download PDF (2.65 MB)
191 Portuguese Armed Forces. Details of Strength, Dispositions and Quality 22 July 1940 Download PDF (1.59 MB)
192 German Air Borne Landings. Possibility of, In Northern Scotland with a View to the Neutralisation of Fleet Bases in the North as a Preliminary to the Invasion of England. Memo. By J.I.C. Covering Memo. By Admiral Sir Reginald Plunket Ernle-Erle Drax, C.-in-C. At the Nore, Putting Forward a Possible German Plan of Invasion of Scotland Based on Norway, and J.I.C. Comments Thereon 25 July 1940 Download PDF (5.23 MB)
193 Spain and Portugal. Present Position In: Note by Secy. Circulating Request of Director of Military Intelligence for Preparation of Short Paper On: 24 July 1940 Download PDF (587 KB)
194 Future Policy for the Conduct of the War. Appreciation Of: Note by Secy. Covering Questionnaire Addressed by J.P.C. to J.I.C. In Connection with Preparation by J.P.C. Of: 24 July 1940 Download PDF (3.14 MB)
Cookies Notification

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Find out more.

Accept