Lt Col Leatham to EWT Sept 17 evaluating Balkan Police traffic, of little value,...

HW 14/112

1944 Sept 16-30

Lt Col Leatham to EWT Sept 17 evaluating Balkan Police traffic, of little value, EWT to C Sept 19 with evaluation, suggests the Army operators involved would be better employed in India, C to DDMI (O) Sept 21 re waste of operators in ME engaged on BalkanPolice traffic; DO No 36 of Sept 18, additional duties for AD (2) Lt Col BE WAllace; EWT's requirements from intelligence and crypto signals Sept 18, typed by initials JIS; DD 3 to HQ Sept 19 complaining over SIS signals distribution to GCCS; Col Bicher of ETOUSA to EWT Sept 22 requesting list of German Sigint centres for US exploitation after capture or surrender; DD (Y) to EWT Sept 27 with WO Sigint requirements for immediate post-war period; DD 3 to DD (C) Sept 27 re signalling of ISOATS traffic to BP from ME, SLU link from Cairo but none from Jerusalem; Sept 15 draft of 9-page talk to be given by J de G to operators at Forest Moor Sept 18-20; Sept 19 agenda for 6th Station Commanders' conference at Shenley; CSO (SW) to AD (WTC) re Sayer's letter of Sept 11 on points arising from Station Commanders' meeting of Sept 7; J de G to AD (WTC) Sept 23 with visit reports for Forest Moor and Beaumanor, J de G accompanied by DD 1 who gave security lecture; WEC to DD (CT) Sept 23 re new Centralised Intercept Control Section; evaluation of GP audibility test at Forest Moor Sept 10-17, Sept 28 results of reception tests on GP Domino traffic at Forest Moor and Shenley, results did not justify uprooting Shenley Sigint unit and transferring to Forest Moor as desired by WO, paper by OC 7 SWC Shenley Sept 23 arguing against proposed move of Shenley unit to Forest Moor, detrimental to GP cover; J de G to OC Kedleston Hall Sept 28 covering captured document on priority prefixes in German W/T traffic, operators and CRR personnel to read, document returned to BP Oct 4; AD (WTC) to Forest Moor Sept 28 with c/s's and frequencies for French military and police tasks; AD (WTC) to CSO (SW) July 28 re printer cover at Forest Moor, reply Sept 30, trial to start Oct 2; Met Section notes for w.e. Sept 16,23,29; AS order on reporting to C of Sigint on supply of sabotage material to foreign workers in Germany Sept 26; extracts from AS monthly letter to Kendrick in Ottawa Sept 29; AEAF Sigint Section to AS re report distribution Sept 16; EWT to Maj Gen Strong at SHAEF Sept 18 on sending Wing Cdr Oeser to brief T Force officers on GCCS requirements for captured comms' documents; MI-6 Sect II minute on Sigint requirements for Army Commanders on internal situation in Germany Sept 21; DD 1 to MI-8 Sept 25 re Sigint units with British Forces of Occupation; Lt Col Blair-Cunnynghame in France to Wing Cdr Oeser of Hut 3 re new variant of Enigma captured in S France, machine being sent by US Signals Col to Washington Sept 30; SLU 21 AG to Colman of Hut 6 Sept 16 with details of captured Army Enigma key; Colman to Lt Col Crankshaw Sept 29 re cover at Capel and frequency measuring at Forest Moor; Col Scott at SLU SHAEF Advanced to EWT agreeing visit by Lt Col Brown of BP to him and 21 AG after Sept 19, Scott requests Brown's ETA Sept 21, ETA Sept 25, postponed to 26th; Scott to EWT Sept 25 re vulnerability of French diplomatic cyphers to German Sigint, reply Sept 29; Scott to Chairman LSIB Sept 26 re degree of Sigint exchange permitted between US 6th AG and integrated French Sigint unit; Scott to Lt Col Brown at BP Sept 26 asking for Army/RAF officers for Captured Documents Section at SHAEF to select items for BP after German surrender, DD (AS) and DD (MW) to each nominate one officer; 1 SIC to BP Sept 16 and 23, Lt Parker, OC 54 R Section to visit BP Sept 25 to discuss comms problems with Major Carr I/C BP Comcen; SLU SHAEF Advanced to Gp Capt Jones re Sigint channels Sept 24; 21 AG order Sept 25 on W/T comms between 21 AG Y Centre and control of EMAS DF network Broadstairs, Sept 28 D of S Sigs 4 to CSW (SW) re 21 AG use of EMAS DF network wef Oct 1, D of S Sigs 4 to 21 AG Sept 29, 12 sets established at Broadstairs for DF; Sandford at 1 SIC to DD3, unable to keep appointment at War Cabinet Offices Sept 29; 7 SIC Siena to BP Sept 26; Chicksands' cover return for w.e. Sept 16,23

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