Not Whistling Jack Smith - some rummy pretending to be the guy who actually recorded the thing - on Beat Club, in the bad old days.
Part of me thinks this became a hit because of that last word in the title, much like Lorne Greene's "Ringo" did at the height of Beatlemania. Bear in mind, that in the strict British usage, a "batman" was kind of like your right-hand man in the military. The guy you sent in to do your dirty work...
21 minutes ago