At the time of setting up this page there are already 100+ radio appearances that have been documented, in this blog.
Jimmy’s earliest appearances, as a guest, were in 2000 (here) and, by 2001, he had an XFM Radio show with Iain Morris (here). Between 2003 and 2011 he appeared in episodes of 7 sketch type shows, reading as a character.
The (randomly ordered) list below is everything with a Category of Radio.