Reading various of the posts above it strikes me that Radio Derby are panic stricken at having somehow produced a program that is not only of regional standard but national standard and they are trying to reduce the quality of their output back to something only suitable for their local listeners!
Either this is a slur upon the populace of Derbyshire or they believe that they cannot take the pressure of having such a widely loved program on their station.

If it is replaced by a phone-in program as Ralphie suggests likey, what would happen if their phone lines and email inbox were swamped by listeners requesting their favourite folk track?