Love going here because it's just what I imagine in a local fish shop....small (you can sit but it's more of a takeout place), simple, and delicious.
The tartar sauce is packaged (I always get take-out though so maybe if you sit then it's different), the portions are fairly good and the prices are cheap. The menu contains quite a bit of variety including other types of meet and it even advertises shawarmas (but there's a shawarma store a couple doors beside this I would recommend over that).
If you stick to fish though, I'd recommend the spicy fish which is a large fried fillet with a bit of a South Asian/lemon taste and I actually prefer this over their traditional haddock fish. The fries are also good (not McDonald's good but probably more natural potato than starch). The menu also contains some other interesting looking options (fish birayani which is small pieces of fried fish with rice). Service is fairly quick because it's usually never busy, I only wish that the fillet was a bit thicker but can't complain, would like to try out more items from the menu.