DDI 3 to EWT and Col Taylor at BP Feb 1 re assessment of strength of Soviet Air Armies,...

DDI 3 to EWT and Col Taylor at BP Feb 1 re assessment of strength of Soviet Air Armies, figures mainly from German Sigint; EWT to C Feb 2 re Scarborough's intercept of plain language message from Geman Navy HQ at Bernau near Berlin stating closing down, EWT to C on control of GP DF net in Berlin closing down Feb 3, DO Hut to Ministries and senior SHAEF officers Feb 7 on move of German Southern Group cypher authority to Greiz in Thuringia, Jan 19; EWT's order on new SLU at Brisbane under S/L Burley with details of DOE between CBB and SLU Brisbane, Feb 7; covering note to EWT from DD (MW) Jan 12 with report on Knockholt by Major Tester after 3 week detachment there, detachment was prelude to new OC Major King taking over and also occurred when HC Kenworthy was absent from the site on duty on the Continent, report was highly critical of Knockholt operation and was therefore marked "For Director Only"; EWT to C Feb 3 re US proposals to start writing Ultra World War II history at BP, EWT suggests bringing up at next SB meeting, decision of SIB meeting at Broadway Feb 8 to postpone Ultra history until end of war but to liaise with US before then; DD (CT) to EWT Feb 4 re PO intercept stations and Williams' report of results for 1944, draft letter from EWT to PO on performance of stations, DD (CT) proposes introduction of BP technical advisors into PO stations; letters from Captian Firth of Admiralty Signals Division to DD 3 and GPO Feb 7 on subject of release of Sigint operators from BP's PO stations for duty at PO coastal stations supporting Merchant Navy, Admiralty attitude unhelpful to BP, H Townshend at GPO HQ to Firth Feb 9 re PO's attempts to obtain more operators for its coastal stations, Firth again to DD 3 Feb 13 re withdrawal of 18 PO operators working for GCCS for work in PO coastal stations; papers by LT Cdr DudleySmith of BP Feb 5 on vulnerability of allied met cypher; AD (WTC) to DD (Y) Feb 1 re WO's signal of Jan 30 re limits to BP's operational control of Army Sigint stations; AD (WTC) to DD (Y) Feb 15 re Kedleston CRR; Shenley to AD (WTC) Feb 10 with Shenley notes on GP Domino intercept problems in face of operator shortage; Major Evans of GPS to AD (WTC) Feb 13 re GP cover and breaking of Raster; intercept highlights to DD 1 Feb 12 from John de Grey of WTC, including move of several German transmitters out of Berlin; AS to DDI 4 Feb 2 re customer request for Sigint on GAF fighters; John Hancock, detached to RAF Chicksands from BP, to DD (AS) Feb 2 re BP support over GAF c/s change, Hancock to AS Feb 7 with amended copy of Chicksands' instructions for intercept of GAF random c/ss from Feb 1, Feb 10 Hancock gives Chicksands' E results since c/s change of Feb 1, AD (WTC) sends on to DD 1 and EWT, Feb 11 congratulations from AD (WTC) to Hancock, Hancock to AD (WTC) Feb 13 responding to praise; AS order of Feb 2 on procedures for outgoing reports; Met Section notes for w.e. Feb 3 and 10; As report Feb 4 on cessation of German Navy met reports since Feb 2, coinciding with closure of Naval transmitter at Bernau; move of AS German Map and Reading Room Feb 5, in future to be known as Document Section; Air Signals Section to Main BP Comcen Hut 14 Feb 6 re start of overnight Daily Headache reports from Cheadle, commencing Feb 8, amended Feb 11; Prof Norman to DD 1 Feb 7 on spoof simulated launches of V2s as reflected in Vera traffic; new Hut 6 statistical proforma for Forest Moor and Chicksands Feb 8; request for US official to visit Captured Documents Library at BP Feb 9, reply Feb 10; TF Higham and Prof Norman to DD 1 Feb 9 with examples of German/Japanese scientific liaison; report by S/L Stacey of AS to DD (AS) Feb 7 on his visit to various SHAEF units and Field Sigint units 365, 382, 383 and 386 WUs and Detachments A, C, D, E and D of US 849 SIS Jan 21-Feb 4; AS to DDI 4 Feb 7 and 14 with reception returns from Field Units of Canterbury Broadcast; AD (WTC) to Lt Col Brown at 1 SIC Feb 2 re DF for proposed 18 ATS sets to be established in Brown's area, reply Feb 2, AD (WTC) to DD (Y) Feb 3 re proposed ATS Sigint station on Continent, MI-8 had chosen Brussels as site, BP would have preferred Metz, BP unhappy with progress without DF, AD (WTC) to EWT and DD 1 Feb 11 re ATS unit, Forest moor to AD (WTC) Feb 14 re proposed ATS Sigint unit in Brussels, objects to operators coming from Forest Moor, S/L Smith of WTC to DD (Y) Feb 14 same subject, BP wishes to abandon plan, AD (WTC) to Forest Moor Feb 15, ATS proposal deferred as result of Feb 1 c/s change; EWT to Brown as 1 SIC Brussels Feb 3, BP sending Vera Playfair results to 365 WU, Brown should visit 365 WU to ensure OC familiar with Ciro/Pearl rules, Brown to AD (WTC) Feb 6 after visiting 365 WU, Brown to EWT Feb 7 having informed 365 WU of Ciro/Pearl rules, 1 SIC to BP Feb 8 re 7 SW and 17 M Sections, 1 SIC to AD 2 Feb 12; AS requirement for Sigint printer channel Brussels - BP AS to be arranged by Brown and AD (WTC) Feb 7, AD (WTC) to Brown Feb 8 listing requirements, Brown to AD (WTC) Feb 11 re printer link; Brown to Jones of Hut 3 Feb 8 re comms link Paris-London, reply Feb 9; 1 SIC Sitrep for Feb 11; draft of 21 AG Sigint plan "Eclipse" Feb 12, to be introduced at time of German surrender; AS to SHAEF Feb 12 re captured GAF documents; Col Scott at SHAEF to AD (WTC) Feb 7 after discussions with Lt Col Brown and Gp Capt Winterbotham at Brussels re employment of field Sigint units; Scott to Jones of Hut 3 Feb 10 re US 6th AG losing truck containing cypher equipment and documents which could enable Germans to read Allied traffic Nov 1944-Feb 6 1945, follow up letter from Scott to EWT Nov 11 listing facts which Germans would now know if they had exploited the lost US comms equipment, list included the movement of toxic gas ammunition to Continent; USSTAF Rear HQ London to BP Feb 2 re Sigint support to USSTAF Advanced Rheims and USSTAF Main at St Germain; SHAEF to Jones Feb 7 re SHAEF instructions for distribution of BP Sigint reports to SHAEF entities at Versailles, Rheims, Paris and St Germain, to start Feb 15-20, follow up signal Feb 12; SHAEF to DMI and C Feb 9 confirming that no Ultra had or would be given to Russians; Col Telford Taylor at BP to Scott at SHAEF Feb 3 on Sigint indoctrination of additional US officers in SHAEF in attempt to improve US Comsec by letting them see what intelligence the Germans were obtaining from US comms, paper to SHAEF from Gp Capt Winterbotham and Col Telford Taylor Feb 5 re indoctrination of 9 US officers dealing with US Comsec, Cols Scott and Bicher to supervise and Maj Gen Strong to personally conduct indoctrinations, Bicher's reply Feb 6, 12th US AG to Telford Taylor and Strong Feb 6-7 re indoctrinations, Scott to EWT Feb 7 requesting visit by a UK and a US expert on Ultra and Sigint security following agreement to indoctrinate 9 US signals officers, Col Bicher to Telford Taylor at BP and Scott at SHAEF Feb 7 re indoctrinations, Maj Gen Strong to/from C Feb 8-11 re indoctrinations, Telford Taylor briefs senior US officers at SHAEF Rear HQ Feb 8, Strong and Scott to Jones Feb 11 re indoctrinations, Gp Capt Jones to C Feb 12 on Ultra security and Telford Taylor's role regarding US officers, C to Strong, Bicher and Scott Feb 12 re indoctrinations, Col Telford Taylor and Lt Cdr Dudley-Smith to leave for Paris to assist, SHAEF to Jones Feb 13, officers to be brought to Paris for indoctrination Feb 18; Telford Taylor to Capt Kellog at SHAEF Feb 13 re service of Sigint to Kellog; Strong at SHAEF to C Feb 2 re problems with French Comsec as reflected in German Y, Col Bicher to DD 1 Feb 4 re cypher system for use with and by French, draft reply to Strong Feb 9 from DD (CSA) to C via EWT on subject of exchange of signals security information with French, proposes SHAEF meeting of interested parties, sent on by C to Strong Feb 13, Scott to Secretary SIB Feb 9 re US 6th AG Sigint liaison with French; liaison with HMS Anderson

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