While at Cambridge University, he presented a student programme and outside broadcasts for BBC Radio Cambridgeshire.

Peacock went on to report on Radio 4 programmes such as The Afternoon Shift with Laurie Taylor, Front Row, Word of Mouth, Home Truths, All in the Mind and Loose Ends.

Ian Peacock has presented numerous documentaries and series for BBC Radio 4, such as Revenge, Memories Are Made of This, Every Breath You Take, Think About It, Tales of Cats and Comets, Tripping The Light Fantastic, The Art of Indecision, The Secret Life of Phone Numbers, Lady Curzon and a Pineapple, From Arial To Wide Latin, Creative Genius, It Was A Dark And Stormy Night, Remembrance of Smells Past, Tempus Fugit, Cache in Pocket, We Were Here – How To Make Your Own Time Capsule, In Search of Originality and the first ever radio feature about Nothing.

He has interviewed many prominent personalities such as Tony Blair, Barbara Cartland, Stephen Hawking, Bob Hope, Spike Milligan, Oliver Reed, Seamus Heaney, JK Galbraith and Robbie Williams, and has reported from Paris, Athens, Kathmandu, Luxor, New York City and Los Angeles.

He was lead trainer on courses such as Writing for Radio, Managing your Presenter and Advanced Features.

As a media trainer, his clients have included Chatham House, Jordans (company), the Home Office, Bournemouth University and the Thai Ministry of Foreign Affairs.