Contingency plans for dispersal of BP staff and records in event of invasion; first...

Contingency plans for dispersal of BP staff and records in event of invasion; first meeting of BP Standing Advisory Committee (SAC); establishment of inter-Service intelligence centre, later to be known as Intelligence Exchange (IE) at BP; suggested improvements in Hut 3 to cope with increased workload; staffing and organisation of GCCS, increase of some 500 staff at BP since Sept 1939, prepared for C, Foreign Office (FO) and Treasury, second chart lists staff at Post Office (PO) Sigint stations at Sandridge, Cupar and Brora and Metropolitan Police Sigint station at Denmark Hill; AGD appeals to staff not to accumulate leave for extended breaks away from BP; Frank Birch, Head of Naval Section (HNS) BP, writes to AGD on staff matters in his section, later sent on by AGD to DNI, Rear Admiral Godfrey; Sigint support from British Dominions, distribution of Sigint from India, security of British and Canadian cyphers, summary report for period Nov 1939-April 1940 from Signals Experimental Section of Royal Canadian Signals; liaison with French and Bertie, Major Jacob of 4 Intelligence School (IS) to visit Bertie, senior French Sigint officers to visit British Sigint stations; GCCS cryptographers to go to Cairo as nucleus of ME Sigint Centre, later to be known as Combined Bureau ME, (CBME); details of Sigint cover at Sarafand, (Palestine), and Cairo; reports on radio fingerprinting, (RFP) and Tina, the study of operator characteristics; security of British military cyphers; illicit German radio stations overseas; copies of German propaganda broadcasts giving results of alleged opinion polls in a number of British towns on certain key questions concerning conduct of the war

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International

Radio and television

Europe and Russia

Conflict

Maps and plans

Intelligence

Navy

Middle East

Communications

Operations, battles and campaigns