For a "chippy" Docs is wonderful! Great decor, service is excellent, and the food is superb! They have Gluten Free fish, so make sure you ask for it, as it's not mentioned on the menu (they really need to promote this more including a huge poster in the window!)
We use their Ardglass shop regularly, although they don't have GF facilities (please reconsider this!) and are always impressed by the quality. Their fish is clearly very fresh.
Definitely be back.