Which BBC radio network broadcast C.S. Lewis’s wartime talks on Christianity?

The BBC Home Service broadcast C.S. Lewis’s wartime talks on Christianity. The talks were transmitted between 1941 and 1944 and later formed the basis of Mere Christianity.

Lewis delivered the broadcasts during the Second World War, when radio was a major source of public information and entertainment in Britain. He aimed to explain shared Christian beliefs in accessible language rather than argue for one denomination.

The talks were revised and collected in book form, but the broadcasts and the later volume are not identical texts. The BBC Home Service was Britain’s domestic radio network; the BBC Third Programme, launched in 1946, came later.