Here's a little news. Went to the garage to repair the bike I dropped off in the last post. Needing a little background music I turned on the radio and it died within about a minute. Seeing as the garage has no power, I needed 8 D size batteries to rejuvenate the sounds.
Or, if you're like me, you rip the wires out of the back of the stereo, crimp terminals on them and power the radio off one of the motorbike batteries lieing around. Sorted!