Earlier quoted context omitted.
And why the reference to Geordies - natives of Newcastle - when the plant is in Sunderland? Google maps tells me those two places are only 14.3 miles away. So 1) that's pretty understandable to conflate and 2) a lot of people from Newcastle probably commute there.
My experience with the British is they frequently have stark rival differences in cultural identity based on which part of which city they live.
This can go very deep because as you know (but may be surprising to our American friends) in Europe we have much less cultural uniformity.
For example, in the two towns in Central Italy that I'm thinking about, which are only 15 km apart, people speak completely different dialects that are only partially intelligible one another.
A fun fact is that now I live in Australia which is one of the countries in the world with the least variance in accent. You can't tell Sydney and Perth accents apart, even though the two cities are thousands of kms apart.