It's definitely chip muffin. I have no patience for those heretics up the road with their chip barms.

If you call it a teacake, and I say no those have raisins in, and you protest that's a fruit teacake, I know you're probably from Burnley: https://www.ourdialects.uk/maps/bread/

>> I used to think everyone called (cobs|bread cakes|rolls|barns) muffins

UK regional dialects are summed up really well here because despite listing five different names for a specific thing you still neglected the word I use (baps).

does that area have a textile manufacturing history?

I ask because i'm only familiar with a thread/yarn bobbin, I wonder if it derived from that.

It’s barm, with an m, from barm cakes. Barm is the frothy scummy stuff you get on top of fermented beer, and it contains yeast. Back in the day bakers would take the barm from local brewers to make weakly fermented bread rolls… barm cakes.

(So obviously those calling them cobs or rolls or whatever else are just wrong!)