About this episode
This episode explores the relationship between the British Secret Intelligence Service and GC&CS during World War 2.
October 2025 Today GCHQ is an independent British intelligence organisation. However during World War 2, GC&CS, as it was then called, continued to be subordinate to the British Secret Intelligence Service, known as SIS or MI6. The Chief of SIS was also the Director of GC&CS. In this episode, we explore the relationship between the two organisations, the part that SIS played in supporting GC&CS, and the ongoing presence of SIS at Bletchley Park itself. Head of Content, Erica Munro, is joined by our Research Historian, Dr David Kenyon, and by a special guest - historian and expert on the wartime history of SIS, Dr Claire Hubbard-Hall. To see the objects we discuss in this episode, visit https://www.bletchleypark.org.uk/our-story/e184-the-sis-at-bletchley-park/ Claire’s book ‘Her Secret Service: The Forgotten Women of British Intelligence’ is available from all good bookshops. Image: ©Bletchley Park Trust 2025 #BPark, #Bletchleypark, #WW2, #Enigma, #MI6, #SIS, #SecretService,
People in this episode
Host: Erica Munro
Guests: Dr David Kenyon, Dr Claire Hubbard-Hall
Topics covered
- British intelligence
- World War 2
- Bletchley Park
- SIS
- GC&CS
- historical relationships
Keywords
- Bletchley Park
- SIS
- MI6
- GC&CS
- World War 2
- intelligence history
- Erica Munro
- Dr David Kenyon
- Dr Claire Hubbard-Hall
Mentioned in this episode
Organizations: GCHQ, British Secret Intelligence Service, SIS, MI6
Books & works: Her Secret Service: The Forgotten Women of British Intelligence
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- E188 - Focus On: Emily Anderson · February 27, 2026 · 1h 3m
- E187 - Codebooks, Diplomats and Diamonds · January 23, 2026 · 54 min
- E186 - Top Secret Misinformation - Part 5 · December 19, 2025 · 52 min
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