Closest thing I have found to traditional English fish and chips. I always get both the fish and the battred sausage. I wish they were open on weekends as that is usually when I am in Portland, but I will admit I have gone to Portland for a day trip just to eat here.
This is a foodcart, so it might not qualify for your purposes, but this was the best Fish and Chips I have ever had. And I've had fish and chips is over 12 counties. I was so impressed, I had to try to get him listed here.