I think that most of the pro-Napoleon songs are from Irish sources rather than British. I don't offhand recall any English ones, downtrodden masses or not. Aggro was directed against our own tyrants..."we have bigger Boney's of our own" springs to mind. Unfortunately the title of this song doesn't - one of the Strawhead pieces (Perhaps from The Old Lamb and Flag? I think I can hear Pat Ryan's voice....). "Little Bantam Emperor" is rather more of the English attitude.

On a similar line, why did Santiana (Santa Anna) of Alamo fame become such a popular star of sea shanties? Were the Americans that unpopular then?