I like Kristian's on n/shields at the fish quay, never been able to fault theirs and there's always plenty. One at blyth on the links is pretty good but skimp a bit on the quantity/size I thought. Other ones in blyth are very hit and miss but the one up at Newsham (top of Plessey road) redeems itself for doing canny kebab meat. Chippy at the harbour at amble isn't bad but they don't do skinless fish and I'm not keen on the skin.
Best I can ever remember is when Bimbi's had the restaurant under the old Odeon (Paramount) on Pilgrim Street in town, dad used to pop down once in a while when he was still at the Odeon and get us some, still remember how good they were even looking back now 20yrs later.