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What are these called where you are?
(i.imgur.com)
From Fife so these are rolls. Roll on sausage, roll on bacon etc. Heard them called different things in different parts of UK.
Born and raised in Liverpool. It's a bap. A bigger, wider one is a barm (barm-cake) and here in the US of A, they like to call the particular sort from the picture, a dinner roll.
Doesn't get called a lunch roll if it's lunch time.