DD (S) to EWT on future development of Sigint channels for new areas with recommendations,...

HW 14/69

1943 Mar 1-10

DD (S) to EWT on future development of Sigint channels for new areas with recommendations, Cdr Saunders to oversee, Mar 4, paper from Saunders on proposal for forming Ultra Committee at BP with plans for dissemination of Ultra to military commanders in the field, Mar 6, exchanges between EWT and AD (S) on recent Hut 3 plans for organising Ultra channels to overseas commands, Mar 7; meeting at BP Mar 5 on number of non-E sets required for a Western Front, Mar 3 Y expansion figures for sets and personnel approved by Cs of S Mar 29, Lt Col Sayer to Welchman of Hut 6 Mar 5 on number of W/T I personnel required for proposed Y expansion, Sayer comments Mar 8 on Sigs 4 proposals for Army expansion of Sigint positions, BP paper to Sayer on potential for Sigint cover on Western Front, particularly GP comms, Mar 6, Y expansion pull-out chart of actual and potential Western Front German comms with map of recommended disposition of UK non-E intercept positions Mar 9, minutes of BP meeting Mar 9 to discuss what measures could be taken in support of potential invasion of France, Sayer to DDI 4 on expansion of RAF Sigint positions; SALU ZIP/EXTRACT 4 on procedures for punching up aircraft movements cards in Mr Freeborn's machine room, Mar 2, SALU instructions for modifying aircraft record keeping Mar 10, plan of AS organisation listing sub-section heads; questionnaire from Capt Sawdon on provision of raw material for GCCS Mar 1, reply from NS Mar 7; Wing Cdr Jones' comments on AD (S)'s draft reply to GHQ Home Forces' letter of Feb 14; GPO reply to Capt EG Hastings on question of providing additional W/T operators for PO coastal Sigint stations Mar 6; draft letter Mar 10 from C to Commissioner Metropolitan Police requesting more PC operators for Denmark Hill; minute from AD (S) alerting sections to add FO or Colonial Office to appropriate report distribution lists, Mar 9; GCCS protest Mar 1 to MI-8 on planned postings overseas of ATS operators from WOYG, summary by Lt Col Sayer of continuing battle with WO to stop or delay posting of experienced ATS operators from WOYG to ME, Mar 9, paper by WG Welchman Mar 10 arguing against posting overseas of 38 ATS from Beaumanor; BP complaint Mar 9 about poor quality of Codfish intercept from Knockholt, Sayer to Kenworthy at Knockholt on future run down of teleprinter processing at Aldford House (AH), Mar 10; appeal from Sayer to DDI 4 to assist in removing RAF interference from a major GP target frequency; liaison with WO and AM; correspondence between EWT and Major GG Stevens in Washington; BP liaison with Acting Director CBME Dryden, Capt Sawdon from BP to visit AFHQ Algiers some time after Mar 8; Sayer at BP to Scott in ME on 7 IS exceeding its terms of reference, ME Sigint links with UK, Scott to Sayer on Sigint unit establishments in ME Mar 6, Sayer to Scott (DDMI YME) for support in preventing experienced ATS Sigint operators from Beaumanor from being posted to Sarafand Mar 7, summary of position Mar 8, Scott agrees to accept trainees instead of experienced operators Mar 8; US Army officer to visit BP for refresher course and to discuss Lt Col Bicher's Sigint requirements for ETOUSA Mar 1, UK Sigint to be made available to US Col Hayes in Algiers Mar 3, security of W/T I in Algiers area; BP liaison with IWIS India; courier service of ZIP/AS, ASF and ASI Summaries to C and 3 Service Ministries to be discontinued Mar 8, Ministries to received teleprinted copies in future; CX/MSS/2233/T38 and 2236/T33 sent to SCU Western Desert Mar 9, reports contained evidence of our knowledge from Sigint of Rommel's battle plans and German POWs had stated that British were aware of the Axis battle plan beforehand, suggesting possible compromise of Ultra by British forces, PM concerned that BP's Ultra capability may have been compromised, Mar 10 list of all BP reports published Feb 26-Mar 5 revealing Rommel's plans, Hut 3's conclusion that Ultra was not compromised, signal from Gen Montgomery to PM via C concluding that enemy could have suspected nothing

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