Your all missing the point the "butties" where bought and consumed in chadderton and round here they call them muffins
If I go to the chippy at dinner and want a chip buttie when I look at the menu board it will describe said bread and potato product as a chip muffin.
So at the point of sale you lot bought and ate "muffins" with out a blueberry insight. With me living closer to chadderton than any of you (and also weighing 18st) I beleave that makes me correct and all you are wrong
Buds