Give the liberty police donuts, the Bretonians Tea, the rheinlanders strudel or sausages or something, and the kusari Noodles or sushi or sake or something. The corsairs can have rum and the outcasts have their cardi.
Imagine the Molly's or gaians flying into Newcastle, saying "Drop that tea shipment! it was made by opressing us!" and the bretonians answering "No! we must defend the tea at all costs! for the Queen!" Hilarity and chaos ensues.