I have the following very helpful reply from Paul Gambaccini.

That clears that up (so far).

"Hi Richard,

You asked if I had mentioned on air that some group is re-recording Bob Dylan anti-war songs. I'm afraid to say I did not. I did recently play the Dixie Chicks' "Not Ready to Play Nice" and discussed the grief they received for criticizing President Bush, but that is very different. This Saturday I will be playing two tracks that happen to fall into the anti-Bush category, the Dixie Chicks and Pink's "Dear Mr. President", but these are written by the artists themselves, not Dylan.

There are probably more political songs to come, as I would imagine that Bruce Springsteen's forthcoming album of Pete Seeger songs, prominently including "We Shall Overcome", will chart highly, as will Neil Young's, which calls for the impeachment of the President.

Best wishes,
Paul"