Historical biography archive · Updated 2026-11-03

Alastair Denniston Biography and Timeline

Follow Alastair Denniston through 3 dated historical records for Great Britain.

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Alastair Denniston, historical timeline

A chronological timeline drawn from matching World History Database records.

3Distinct records

1 of 1Page

1939–1941Years on this page

1939

January 1939

Enigma Machine

Paris · Warfare / World War, 2nd

Represents GC&CS at the January Paris meeting with Polish and French cryptologists.

Role range: 1939-1945

25 July 1939

Enigma Machine

Pyry · Warfare / World War, 2nd

Learns at Pyry that Poland has reconstructed military Enigma and built working cryptanalytic machinery.

Role range: 1939-1945

1941

January 1941

Enigma Machine

Bletchley Park · Warfare / World War, 2nd

Shows visiting American intelligence officers the British Bombe during the Sinkov Mission.

Role range: 1939-1945

Records, sources and methodology

These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.