Launching our new series of guest diaries by people in the news is BBC Radio 4's chief announcer, Peter Donaldson. For 30 years his gracefully modulated tones have informed and reassured the nation. Now he reveals how he's managed to maintain continuity in a cut-throat world.
As comedian Helen Keen’s Radio 4 series on the history of rocket science begins, she tells Matthew Adams why it’s a subject with room for the serious and the absurd