Benn has often performed on BBC Radio 4 where he was a regular contributor to "The Now Show" from 1999 to 2016, and BBC Radio 2's "It's Been a Bad Week" (between 2000 and 2006). He is also an occasional contributor to "Jammin'" on BBC Radio 2. In 2004 he created his own aptly named series, "Mitch Benn's Crimes Against Music" on Radio 4, featuring Robin Ince and Alfie Joey; this has now run to three series. In 2005 he started a series for BBC7 called "The Mitch Benn Music Show" where he plays records of comic songs and invites musical comedians into the studio to perform. He took a small role as "Pseudopodic Creature" in the Quintessential Phase of Radio 4's "The Hitchhiker's Guide to the Galaxy" in 2005. Until 2014, he regularly appeared on BBC Radio 2's "Steve Wright Show" as the voice of ""Elvis"" in the "Ask Elvis" feature.