For comedy shows, try BBC Radio 7 (comedies, old radio series, drama), but it's digital so you'll need a DAB radio, or, if you have a TV with a freeview box in your bedroom, you should be able to pick it up on that. Only problem might be (as I found) that some radio stations have a logo or programme information on screen constantly, which can be a nuisance if you just want to listen in the dark. I think some freeview boxes give you the option to turn off the visual. (And yeah, I know I could have turned the brightness right the way down, but who wants to keep readjusting the screen settings every day?)