List of GCCS sections by hut and room number and with associated senior personnel;...

List of GCCS sections by hut and room number and with associated senior personnel; report for C and EWT from AGD on current position of exploitation of diplomatic cyphers world-wide, AGD supports MEW request for more raw Sigint from Canada; Type X Sigintsignals sent out from BP May 27-29 by precedence, instructions for preparation and transmitting Sigint messages in Type X; AS Research and Exploitation Report for May 1942; weekly BP liaison visits to SIS at Glenalmond via St Albans; notes by DDMI (O) after visit to BP on May 26; GPO providing extra rhombic aerial at Brora; French Resistance messages processed at BP sent to Major Cowgill of SIS; more on controversy between RSS and GCCS on Italian military network; liaison with Australia and Canada, plans for Oliver Strachey's return from Ottawa in July after 6 months as the first GCCS liaison officer, not to be offered his previous job at BP as head of ISOS Section, letter from AGD to Strachey May 28; Sigint liaison with Mombasa and with Shaw in Kilindini Kenya; correspondence with CBME, security of RAF comms in ME, establishment of 276 Signals Wing Sigint unit in ME, Sigint positions in Malta not to be reduced, risk of malaria when en route to ME via Lagos, regular pattern of GAF recce operations over Med seen as aid to routing Allied convoys, UK Sigint in East Africa, Vichy colonial comms targeted, Chairman of Y Board to Director CBME on security of Sigint information; cover plan for Harpendon, May 1-20; intercept returns for FO Y stations; request to 4 IS from 6 IS for more sets and operators; Type X equipment for MI-6; interrogation of German POW with knowledge of E; distribution of BP Sigint reports to BGS (I) Home Forces; Sigint evidence for setting up of German met station at Vigo in Spain; procedures for tracing/elimating interference on Sigint frequencies; German Sigint intercepts Norwegian messages to WO London detailing German radio transmitters in Norway

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