Many thanks all for the comments. I 'need' DAB for BBC6, although I have been quite happily using the same FM radio for over 20 years. Good sound and still going strong. It's just that I had this one given to me, and don't have any obvious use for it.
I could extend the mains adapter. I don't like the way it works, though. It stays 'hot' and draws 5W on idle.
I think I'll try 5 x AAs that I have anyway, and see how it pans out in use.
(posted to uk.rec.audio too)