"Yarmouth was full of Scots fish-gutters." Quite so Jim. My mother-in-law's grandfather lived in Gorleston and she said she remembers the place was full of Scottish girls. Likewise the link below suggests that perhaps over half the fishing fleet setting out from these ports originated in Scotland. So the place was presumably teeming with Scottish men at times too. It wouldn't be unusual for an Englishman to pick up a word often used by Scots especially when the said word isn't in itself even alien to England.


"The catches during this period were prodigious. This was the time when it was said it was possible to walk from one side of Great Yarmouth harbour to the other, across the boats. By the end of this period Great Yarmouth had a fleet of over one thousand boats, three quarters of which made the autumnal trip from Scotland. Lowestoft had a massive fleet of over seven hundred and fifty boats, with over half coming from Scotland"


http://www.gorlestonhistory.org.uk/fishing/fishing.php