The National Archives, Kew, London

ADM 179/146: Orders for Operation "Medium": information on intelligence and communications, report of proceedings of HMS REVENGE (1940)

AIR 2/5238: Enemy Air Offensive against Great Britain (Code B, 45): Operation MOONLIGHT SONATA (bombing of Coventry) and counter-plan COLD WATER

AIR 2/7415: Fighter Command: Fighter interception during raid on Coventry on night of 14/15th Nov. 1940: report

AIR 8/352: Operations “Moonlight Sonata” and “Cold Water”

AIR 14/2905: “Headache”: progress reports Nos. 1–44 (July 1940–December 1942)

AIR 14/671: Operation "Medium": Bomber Command co-operation with Royal Navy (1940 Oct.–Nov.)

AIR 20/1046: Operation "Medium" (1940 Sept.–Oct.)

AIR 22/481: Air Ministry W/T (Wireless Telegraphy) Intelligence Service Daily Summaries: nos. 425-454 Vol.6 (1940 Nov.)

AIR 27/188/22: Operations Record Book, No. 99 Squadron (1 September– 31 December 1940)

AIR 27/958: Squadron Number 139, Summary of Events: Y (1 – 31 October 1940)

AIR 27/963: Squadron Number 139, Appendices: Y (1 September 1939 – 31 December 1940)

AIR 29/602: Operations Record Book, Blind Approach Training and Development Unit/Wireless Intelligence Development Unit (1939 Sept.–1940 Oct.)

AIR 40/2401: Interrogation of German and Italian Prisoners of War: Reports 1940 Oct.–Nov.

AIR 40/2402: Interrogation of German and Italian Prisoners of War: Reports 1940 Nov.–Dec.

AIR 40/2336: RCM: 80 Wing Periodical Reports, 1940.

AIR 40/3071: CSDIC(UK) SRA Nos. 500–899 (incomplete) 11/9/40–12/11/40

AIR 40/3049: Report No 10: X-Gerät (German system of blind bombing) (1 January–31 December 1940)

AIR 40/3072: CSDIC(UK) SRA Nos. 900–1199 (incomplete) 3/11/40–28/1/41

AVIA 7/131: Air Ministry Research Establishment, Worth Matravers, Swanage, Dorset: Programme of Research Work “Headache” (Part I)

AVIA7/132: Air Ministry Research Establishment, Worth Matravers, Swanage, Dorset: Programme of Research Work “Headache” (Part II)

HW 1/1: Letter to C requesting daily service of messages for Prime Minister PM (27 September 1940)

HW 1/3794: Correspondence with C concerning officers in various ministries who were aware of or had access to Special Material” (15 October–7 November 1940)

HW 5/2–7: HW 5/5: Government Code and Cypher School: German Section: Reports of German Army and Air Force High Grade Machine Decrypts (CX/FJ, CX/JQ and CX/MSS Reports) 29 May 1940 – 1 Jan 1941

HW 5/719: "BROWN" reports — translations for Dr R V Jones (ADI Science) of traffic of LN Versuchsregiment, Koethen, relating to the setting up and operation of navigational beams (Knickebein) to guide Luftwaffe bombing raids (1940 Sept 5–1941 Mar 25)

HW 14/8: Government Code and Cypher School Policy Papers (November 1940)

HW 14/9: Government Code and Cypher School: Policy Papers (December 1940)

HW 48/1 Intelligence reports and correspondence concerning German preparations for the invasion of Britain (17 May 1940–4 March 1941)

Imperial War Museum, London and Bundesarchiv-Militärarchiv, Freiburg-im-Breisgau

General Quartiermeister 6. Abt. aircraft loss reports, November 1940

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