Bletchley Park

May 2017 Highs and lows of the codebreaking operation at Bletchley Park are the subject of this month’s episode. There were a lot of lows, but it’s not all doom and gloom. We know how the war ended but, back then, the threat of invasion still hung in the air and Hitler’s forces were making great gains, not only in Europe. This was also around the time when the German Navy decided to tighten the security of its radio traffic in the Atlantic, where Allied shipping convoys were being found and sunk with horrifying success. We explore this - and the expansion and change of leadership at the Government Code and Cypher School - with Bletchley Park’s Research Historian, Dr David Kenyon and the late Captain Jerry Roberts. Also this month, Helen Leadbetter was a wireless telegrapher in Canada during World War Two, providing the codebreakers at Bletchley Park with the raw material they deciphered and turned into vital intelligence. She told her story to the broadcaster CBC, who we have to thank for letting us share