Even if you've never heard of Chris Aldridge, the chances are you've heard him read news, introduce plays or deliver the Shipping Forecast as senior continuity announcer for Radio 4.

He describes his role and how he generally helps the show to run smoothly. While the show is on air, Ed is responsible for dealing with the callers, assessing them editorially and putting the best ones through to air. Calls come through thick and fast and Ed needs to make quick decisions and...