As Allan said, Yarmouth was full of Scots fish-gutters.
Also, Sam Larner, on whom much of the 'Shoals' text was based, regularly put into Scots ports while on a trip. He described taking part in a singing competition in Peterhead on one of these trips
There was much to-ing and fro-ing between the eastern ports; Sam's nephew's wife Ella was nicknamed 'Sunderland' because that was her home place, having moved down from there as a fish-gutter - "bonny" is a word still commonly used in her part of the world.
Jim Carroll