EWT order to Service Chiefs, with comments from HAS and AD (S) on handling of Ultra...

HW 14/37

1942 May 11-20

EWT order to Service Chiefs, with comments from HAS and AD (S) on handling of Ultra material; reorganisation of Research Section in Hut 3 under FL Lucas; EWT to DCSS, Col Vivian, on staff security problem, outside personal contact to be investigated; EWTnotes for BP security officers; security and reliability of Hollerith encyphering machine, modification of Type X equipment, Type X equipment for BP; letter from Gordon Welchman, Head of Hut 6, to Nigel de Grey, (AD (S) apologising for his outburst earlier that day, summarises Hut 6 problems which mainly revolved around the morale of his female staff; BP reports on German Sigint Organisation, 6 IS report on German Sigint DF organisation; 3 ATS decoders for Hut 6 to be detached to GHQ Home Forces in event of invasion; MEW letter to AGD asking for more Sigint from Canada on Far East; Director WRNS and WRNS Superintendent The Nore to visit BP on June 8, case for commissioning some BP Wrens, new officer posts required for supervision; access of RSS officer Capt Trevor-Roper to BP, EWT to C agreeing to ban him, support from SIS, RSS Group 8 Italian net subject for disagreement between Trevor Roper and GCCS, RSS intercepts Soviet diplomatic traffic; French Resistance traffic sent to SIS from GCCS; handling of ISOS material both at BP and in ME; new aerial to improve reception at PO station at Brora; liaison with Colombo, India and Canada, 21-page report on Canadian Sigint organisation by Capt HR Sandwith of British Admiralty, compiled at Ottawa during his visit to North America for the CANUKUS Sigint Conference in Washington; correspondence with CBME, case for continuing Sigint in Malta, Air Marshal Tedder's assessment of German ME plans - to capture Malta, congratulatory signal to BP from Air Marshal Tedder, AOC-in-C ME, German intentions in ME - a Sigint appreciation, JIC (MEF) assessment of German intentions in Libya based on BP Sigint reports, results of monitoring exercise on British military comms in ME and W Africa with recommendations for improvements, German Sigint reports on RAF delivery flights to Gibraltar - evaluation by AM AI 4B, RSS and GCCS cover in ME, results of monitoring exercise on British military comms in ME and W Africa with recommendations for improvements; YC note on German development of non-morse comms; agenda for Inter-Services Cypher Security Committee meeting, security of UK cypher systems; support for Bomber Command from RAF Kingsdown; monitoring of Coastal Command air/ground comms by RAF Cheadle; AM suggestions for coordination and selection of transmissions of Special or MSS material to various commands overseas

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