Bletchley Park

Bletchley Park is the home of British codebreaking and a birthplace of modern information technology. It played a major role in World War Two, producing secret intelligence which had a direct and profound influence on the outcome of the conflict. The site is now a museum and heritage attraction, open daily.

The Bletchley Park Podcast brings you fascinating stories from Veterans, staff and volunteers on the significance and continued relevance of this site today.

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Friday · 59 min
E194 - Polish Stories
August 2026 Bletchley Park Trust was proud to celebrate our first 'Polish Codebreaking Festival' in July 2026 with over 2,000 members of the public, musicians and Polish community groups on site. We also welcomed a group of experts whose works bring attention to tales of Polish wartime heroism and intelligence achievements. Of course, Team Podcast took the opportunity to speak to some of them! This episode is a compilation of fascinating short interviews with podcast producer Mark Cotton, helping us continue to shine a light on these lesser-known Polish stories. • Bletchley Park’s CEO, Iain Standen, gives us the background to the weekend and shares news of forthcoming exhibitions. • Award-winning author Clare Mulley discusses her research into two women who risked their lives working in espionage and resistance for the Polish cause. • Historian, cryptologist and author Dr Marek Grajek considers the Polish work on German Enigma in the context of the later Allied victory. • Sir Dermot Turing delves deeper into the famous 1939 Pyry conference and its legacy within British codebreaking. • And Dr Maksym Kempinski from the Enigma Cipher Centre in Poznan reveals more about those Polish codebreakers that tend to get overlooked. Grateful thanks to the Polish Cultural Institute in London, and the Embassy of the Republic of Poland for their support of the Polish Codebreaking Festival. Music performed by the Mazury Dance Company Choir. ©Bletchley Park Trust 2026 #BPark, #Bletchleypark, #WW2, #Enigma, #Codebreaker,#Poland,
July 24 · 50 min
E193 - Focus On: Asa Briggs
July 2026 Lord Asa Briggs – the Keighley-born historian of the Victorian age and of broadcasting, served most prominently as vice-chancellor of the University of Sussex and later Chancellor of the Open University. He was one of Britain’s most influential public intellectuals of the 20th Century. Less well known, however, is the formative period he spent at Bletchley Park between 1943 and 1945. Arriving somewhat after the time of pioneering codebreaking, Asa found a mature Hut 6 working efficiently and at scale. His insights into the work, as well as the social life at Bletchley Park, documented through contemporary diaries and letters as well as later writing, reveal much about the experience of the rank and file codebreakers in the Bletchley Park ‘intelligence factory’. Bletchley Park’s Research Officer, Dr Thomas Cheetham, is joined by Adam Sisman, author of ‘The Indefatigable Asa Briggs’, to focus on the life of this era-defining figure. This episode is interspersed with an interview we recorded with Lord Briggs on one of his last visits to Bletchley Park. ©Bletchley Park Trust 2026 #BPark, #Bletchleypark, #WW2, #Enigma, #Codebreaker,
June 26 · 52 min
E192 - From Warsaw to Hemel Hempstead
June 2026 The story of the vital contribution of Polish codebreakers to the cracking of Enigma before World War Two is well known, but what happened to those codebreakers after the invasion of Poland in 1939? In this episode we follow the long and winding path of the Polish cryptanalysts from Warsaw to London. We also look more widely at the work done by the Polish Government in Exile in the UK to intercept wireless traffic and collaborate with Bletchley Park on signals intelligence. Head of Content, Erica Munro, is joined by our Research Historian, Dr David Kenyon. Our thanks go to Dr Ben Thomson for voicing our historical documents. For the interview we mentioned with Ferdynand Vanke, go to http://www.youtube.com/@csenigma1091 Image courtesy of Bletchley Park Trust #BPark, #Bletchleypark, #WW2, #Enigma, #Polish, #Poland, #Codebreaker,
May 29 · 58 min
E191 - Music at Bletchley Park
May 2026 Against the backdrop of war and secrecy, the Codebreakers of Bletchley Park were often able to enjoy comfort in music. From choirs to orchestras, gramophone evenings to opera, music appears again and again as a recurring motif in the social lives of those working at the Government Code & Cypher School. This episode delves into several different aspects of a topic that we are often asked about, but which frequently gets overshadowed by the showier activities of the BP Drama Group. Head of Content Erica Munro and Head of Audiences and Programmes Vicki Pipe will discuss some very special musical material from Bletchley Park Trust's archive. Hear from researcher and musician Crispin Lewis about his famous BP relative, composer Herbert Murrill. We are also joined by Research Officer Dr Thomas Cheetham to explore links between music and codebreaking. Many thanks to Crispin Lewis for allowing us reproduce his performance of Herbert Murrill's 1942 piece 'In Youth Is Pleasure'. www.crispinlewis.com See copies of the documents we discuss in this episode here: https://www.bletchleypark.org.uk/our-story/e191-music-at-bletchley-park/ Image: ©Bletchley Park Trust 2026 #BPark, #Bletchleypark, #WW2, #Enigma, #Codebreaker,
April 24 · 53 min
E190 - Focus On: Josh Cooper
April 2026 Thriving in the world of wartime codebreaking took more than just smarts and skill. Tact, diplomacy and organisational talent were needed to achieve results and navigate the fractious politics of the intelligence community. In these circumstances even the most shining of lights could be overshadowed by events. The achievements of outstanding talents could be almost lost to history, as the subject of this month’s podcast proves. In this episode - the second in our 'Focus On' series about remarkable figures in wartime codebreaking - we are joined by Research Officer Dr Thomas Cheetham. He brings a personal insight into the career of Josh Cooper, the head of Bletchley Park’s Air Section. Cooper was an intelligence pioneer, the legacy of whose tireless wartime work has been eclipsed by his eccentric personality. Our thanks go to Dr Ben Thomson for voicing our historical documents. Image: ©Bletchley Park Trust 2026 #BPark, #Bletchleypark, #WW2, #Enigma, #Codebreaker,
March 27 · 59 min
E189 - Dilly and his Girls
March 2026 The 28th of March 2026 will be the 85th anniversary of the naval Battle of Cape Matapan, fought by the Royal Navy against the Italian fleet in the Mediterranean. The battle was a significant victory for the Allies and cast a shadow over the Italian navy, making them reluctant to challenge British superiority at sea in the Mediterranean for the remainder of the war. In part, the battle came about due to knowledge of Italian operations derived from codebreaking at Bletchley Park, and it is one of the few successes by BP in that theatre of war which is widely recognised. In this episode Head of Audiences and Programmes Vicki Pipe is joined by Research Historian Dr David Kenyon to go beyond the popular mythology of this event to look in more detail of what exactly GC&CS knew, and when. Our thanks go to Dr Ben Thomson for voicing our historical documents. Image: Public Domain https://www.awm.gov.au/collection/C28674 #BPark, #Bletchleypark, #WW2, #Enigma, #Italy,
February 27 · 1 hr 3 min
E188 - Focus On: Emily Anderson
February 2026 Even amongst the distinguished ranks of WW2 codebreakers, Emily Anderson stood out. Recruited into military intelligence during WWI, her stellar career in diplomatic codebreaking lasted into the 1950s. Her greatest achievement came with the breaking of high-level Italian ciphers during the East African Campaign of 1940-41. It was called 'the perfect example of the cryptographers' war' and earned her the OBE in 1943. Anderson was also a renowned musicologist - her translations of the letters of Mozart and Beethoven are still considered authoritative. Yet until recent years, her life and intelligence work remained under the radar. This episode helps to set the record straight, and kick off a new occasional series focusing on key personalities in codebreaking and intelligence. Bletchley Park's Research Officer Dr Thomas Cheetham is joined by Jackie Uí Chionna from the University of Galway to discuss the subject of her 2023 biography Queen of Codes: The Secret Life of Emily Anderson, Britain's Greatest Female Codebreaker. Our thanks go to Sarah Langston for voicing our historical documents. The Marriage of Figaro - K. 492 CC PDM 1.0 www.classicals.de Image: © Dr. Dagmar von Busch-Weise #BPark, #Bletchleypark, #WW2, #Enigma, #Italy, #Galway
January 23 · 54 min
E187 - Codebooks, Diplomats and Diamonds
January 2026 Rome: the 1930s, and the Italian secret services were having extraordinary success in reading the messages sent by rival countries’ diplomats from their embassies in the ‘Eternal City’. With the road to World War Two still ahead, it was a time of significant geo-political tension. The Italian government was learning the secrets of countries such as Britain and France in order to gain an advantage in international affairs. This would continue after Italy joined the war in 1940, with substantial consequences for the campaign in North Africa. In this episode, we will hear how the Italians didn’t succeed by using mathematicians or intellectuals, but with a rather more direct approach. David Kenyon, Bletchley Park’s Research Historian, joins podcast producer Mark Cotton to reveal more. Our thanks go to Dr Ben Thomson for voicing our historical documents. Image: ©UK in Italy “Old British embassy with flag” CC BY-ND 2.0 #BPark, #Bletchleypark, #WW2, #Enigma, #Italy,
Dec 19, 2025 · 52 min
E186 - Top Secret Misinformation - Part 5
December 2025 This is the fifth instalment of our annual episode where we celebrate the oncoming festivities of the snowy season - religious or secular - with a surfeit not of turkey and roasties but of questions! Questions sent in by our listeners, gifted to us through the medium of social media. A selection of these holiday treats, where we bust myths and reveal hidden histories, has been made by Team Podcast who are all present and correct for this episode. Who are Team Podcast? Erica Munro (Head of Content), Dr David Kenyon (Research Historian), Dr Thomas Cheetham (Research Officer) and podcast producer Mark Cotton. We have six of our listeners' finest questions to share with you - we will do five of these as a usual Q&A, but look out for the sixth question - relating to pets - as we intersperse our interview with simian Siginters' sidekicks, and canine Codebreakers' companions. Image: ©Bletchley Park Trust 2025. Photograph of Corporal Dionne, a dog, on watch at Gorleston. #BPark, #Bletchleypark, #WW2, #Enigma, #Q&A,
Nov 21, 2025 · 59 min
E185 - Reaping the Whirlwind
November 2025 During the second half of World War 2, the Allied air forces launched a large-scale heavy bomber offensive against German cities and war industries. This was designed to damage Germany's ability and will to continue the war. It also represented a way for Britain and the USA to support the Soviet Union before the D-Day invasion. The whole campaign was guided by intelligence, to identify the right targets, determine how badly they were damaged, and assess the effects on the German war effort. This huge undertaking taxed Allied intelligence capabilities to their limits. It has since become one of the many contended issues in the debates around this costly and controversial campaign. In this 'It Happened Here' episode, we are joined by Research Officer Dr Thomas Cheetham to explain the ways Signals Intelligence from Bletchley Park did - and didn't - guide Allied bombing strategy. Our thanks go to Owen Moogan and Sarah Langston for voicing our historical documents. Image: © National Museum of the US Air Force (Public Domain) This episode is a follow up to episodes E170 & E171. #BPark, #Bletchleypark, #WW2, #Enigma, #BomberCommand, #USAAF,
Oct 24, 2025 · 1 hr
E184 - The SIS at BP
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,
Sep 25, 2025 · 1 hr 1 min
E183 - 'Ladies & gentlemen, go your ways!'
September 2025 In 1945, Britain celebrated VE Day in May and VJ Day in August, as the war - first in Europe and then the Far East - came to an end. For the staff of GC&CS and its larger worldwide network, this meant that the vital and exhausting work they'd been doing suddenly stopped. The lives of all of them had been changed forever, but each person's experience was different. Bletchley Park's Oral History archive is a treasure trove of Veterans' testimonies. In this It Happened Here episode, we will be digging into our sound archive to focus on how the workers reacted and what happened to them once peace was declared, in their own words. Our guide through these stories is Bletchley Park’s Research Historian Dr David Kenyon. This episode features the following Veterans’. Nora Copleston Miriam Myland Mary Kenyon Ron Unwin Betty Lawrie John Statham Betty Flavell Fay Gold Joan Smeaton Gwen Page Dot Tuffin Kenneth Nicholson John Moseley Jimmy Thirsk Rena Stewart Mary Every Daphne Canning Betty Webb Lady Marion Body Margaret Thomas Image: ©Bletchley Park Trust 2025 #BPark, #Bletchleypark, #WW2, #Enigma, #VEDay80, #VJDay80,
Aug 22, 2025 · 1 hr 2 min
E182 - "… and Peace at Last"
August 2025 On 15 August 2025 the UK commemorated the 80th anniversary of VJ Day, the day on which the surrender of Japan and the end of World War Two was announced. This was a significant moment at Bletchley Park as it meant the end of almost six years of non-stop codebreaking and intelligence work. For many it also brought an abrupt halt to years of training to learn Japanese and long journeys to reach postings in India, Sri Lanka and elsewhere in preparation for the upcoming invasion of Japan itself. In this ‘It Happened Here’ episode we are joined by Bletchley Park’s historians Dr Tom Cheetham and Dr David Kenyon to discuss how the Japanese war ended and the part played by Bletchley Park and signals intelligence. Our thanks go to Owen Moogan and Dr Ben Thompson for voicing our historical documents. Image: Japanese surrender aboard the USS Missouri. Public Domain, United States Navy. #BPark, #Bletchleypark, #WW2, #Enigma, #VJDay80,
Jul 23, 2025 · 54 min
E181 - Blitzkrieg in Burma
July 2025 By late 1944, the tide had turned against the Japanese in south-east Asia, with the repulse of their attempted invasion of India. However, the multi-national Allied forces in Burma still faced enormous challenges if they were to retain the initiative, and push the enemy out of the country. Every mile travelled from their supply bases, across barely-navigable expanses of jungle and mountain, exposed Allied troops to greater difficulties and risk of starvation and destruction. It was a struggle against the terrain and a race against time to liberate Burma before the arrival of the monsoon. In this struggle, intelligence and deception were essential weapons in the Allied arsenal. In this It Happened Here episode, Head of Audiences and Programmes Vicki Pipe is joined by Research Officer Dr Thomas Cheetham to explore the 1945 battles for Burma and the race to Rangoon which formed the climax of Britain’s war against Japan. This episode features Veteran’s Eric Rhodes, Roy Buckmaster and Dennis Underwood, from our Oral History archive. Our thanks go to Owen Moogan and Dr Ben Thompson for voicing our historical documents. Image: Oil painting of General William Slim, 1st Viscount Slim. #BPark, #Bletchleypark, #WW2, #Enigma, #14thArmy,
Jun 29, 2025 · 1 hr
E180 - Dire Straits
June 2025 In May 1945 the Royal Navy fought its last surface action against the Japanese fleet, sinking the cruiser Haguro in the Mallaca Strait, off the coast of Malaya. The successful location of the enemy ship was the result of signals intelligence. It was also a product of the sophisticated network built up by Britain, the USA and Australia after 1943 to intercept, decipher and distribute intelligence around the Pacific and Indian Oceans. In this ‘It Happened Here’ episode, we are joined by Bletchley Park’s Research Historian Dr David Kenyon to discuss the role of the Codebreakers in this milestone on the road to ultimate victory over Japan in 1945. This episode features Veteran Edward Simpson from our Oral History archive. Our thanks go to Dr Ben Thompson and Owen Moogan for voicing our historical documents. Image: Public Domain #BPark, #Bletchleypark, #WW2, #Enigma,
May 30, 2025 · 59 min
E179 - Dollis Hill Days
May 2025 During World War Two, Bletchley Park collaborated with several external engineering institutions in developing the famous codebreaking machines, such as the Bombes and Colossus. One such institution was the Post Office Research Station at Dollis Hill in London. In 2022, the previously secret war diary of the Research Station were released online to the public by BT, the successor to GPO Telecommunications. In this episode we are joined by James Elder, an archivist from BT Group Archives, as well as our own Research Historian, Dr David Kenyon, to find out what information the diaries can reveal about this secret collaboration. Many thanks to Dr Ben Thomson for voicing extracts from the War Diary. Image: © Courtesy of BT Group Archives (TCB 473/P 5105) #BPark, #Bletchleypark, #WW2, #Enigma, #BT, #GPO,
Apr 30, 2025 · 58 min
E178 - VE Day 80: Objects and Memories
April 2025 To mark 80 years since the end of the war in Europe, this episode takes a closer look at four intriguing items from Bletchley Park’s collections. The team digs deeper into the stories that lie behind a mysterious message, a misunderstood photograph, a moving memo and audio of a Veteran’s memories of VE Day. Head of Content Erica Munro meets up with Research Historian Dr David Kenyon, Research Officer Dr Thomas Cheetham and Museum Archivist Dean Annison. Plus producer Mark Cotton speaks with former WRNS Bombe Operator Ruth Bourne about her VE Day memories. Many thanks to Dr Ben Thomson for voicing our archival documents. To see the objects we discuss in this episode, visit www.bletchleypark.org.uk/our-story/e178-ve80/ Image: ©Bletchley Park Trust 2025 #BPark, #Bletchleypark, #WW2, #Enigma, #VEDay80,
Mar 21, 2025 · 1 hr
E177 - Vengeance from the Skies
March 2025 In 1943 there seemed to be few mysteries left unsolved for Bletchley Park. But by the middle of that year, whispers would be heard of new threats: the V-1 ‘flying bomb’ and V-2 rocket. What began with hints of secret trials on the Baltic would grow into an investigation which would strain Allied scientific intelligence to the utmost, as well as revealing serious flaws in the operation at Bletchley Park. But by the time ‘vengeance-weapon’ attacks against the United Kingdom began in 1944, the Allies knew what they were facing; enabling countermeasures to be put in place which, despite the immense destruction the weapons caused, likely saved thousands of lives. In this ‘It Happened Here’ episode, Head of Audiences and Programmes Vicki Pipe is joined by Research Officer Dr Thomas Cheetham to discuss the secret weapons which represented Nazi Germany’s last-gasp attempt to turn the tide of World War Two. This episode features Oral History recordings of WAAF Filter Officer Eileen Younghusband. Many thanks to Dr Ben Thomson for voicing our archival documents. Image: ©Bundesarchiv, Bild 141-1880 / CC-BY-SA 3.0 #BPark, #Bletchleypark, #WW2, #Enigma,
Feb 21, 2025 · 56 min
E176 - The Age of AI
February 2025 Here at Bletchley Park - one of the birthplaces of modern computing – our latest temporary exhibition ‘The Age of AI’ has just opened. This new gallery explores the power and potential of AI in our everyday lives. From the 1930s origins of what we now call ‘artificial intelligence’, to the incredible (or alarming?) potential it might bring, the exhibition explores the benefits and risks of AI in our world today. In this episode, Head of Content Erica Munro meets the team behind the exhibition’s creation. Come with us on a gallery tour with Exhibitions and Interpretation Manager Tilly Davis, and hear from experts and visitors on their impressions of what AI means to them. There’s also a deeper dive into the research and exhibition’s case studies with Content Curator Steve Swaby. Many thanks to our contributors Dame Wendy Hall, Dr Ed Pyzer-Knapp, Professor David Leslie and our Friends of Bletchley Park exhibition preview visitors. Image: ©Bletchley Park Trust 2025 #BPark, #Bletchleypark, #WW2, #Enigma,
Jan 27, 2025 · 59 min
E175 - Decoding the Holocaust
January 2025 The 27th of January 2025 is the eightieth anniversary of the liberation of the concentration camp at Auschwitz-Birkenau - an event marked annually by Holocaust Memorial Day. In order to perpetrate the mass killings and other crimes of the Holocaust, the Nazi regime needed to coordinate and communicate about its activities. This included wireless communications which were intercepted and decoded at Bletchley Park. In this episode we take a look at what the Government Code and Cypher School (Bletchley Park) knew about these Nazi crimes, how and when this information was obtained, and how western governments responded to the news. Bletchley Park’s Research Historian Dr David Kenyon is joined by journalist, author and Holocaust historian Christian Jennings to discuss his work on the role of codebreaking in these terrible events. Image: ©Bletchley Park Trust 2025 #BPark, #Bletchleypark, #WW2, #Enigma, #Holocaust,

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