Thanks to whoever linked the Dundee by-election story. Churchill did stand for Dundee and its all interconnected with that. I still can't think of who individually placed the song, but it shows my complete ignorance of Scottish political history and the significance of 'Free' Trade and industry in the Dundee area. It only becomes clear if you read the linked piece. From a simple parody there is a heap of meaning, that is lost unless you know the background.