This has been debated previously.
The BBC will be aware of the mass of hostility that has greeted the inclusion of Jo Whiley onto Simon Mayo's Drivetime.
Sources infer that neither presenter was in favour of the change, forced by the bright idea that 'diversity' needs to come before simple analysis of the suitability of changes, and the audiences' reactions to them.
The BBC now has to grit its teeth for a sufficient time to look as though they abandoned the show for reasons other than its utter and compete miserable failure for minute one of broadcast.