London calling: Researcher Erica Harrison on fascinating history of Czechoslovak exile government’s wartime BBC broadcasts

During WWII, the London-based Czechoslovak government in exile had only one
method of communicating regularly with its people at home: over the
airwaves of the BBC. To discuss the content of these programmes,
ministers’ broadcasting skills, coded messages to the resistance and
much
more, I recently caught up with academic Erica Harrison, who has conducted
ground-breaking research into the subject. My first question: How much
broadcasting did the exile government actually do?