I have been ordering from Rosanna Fish and Chips via Uber eats and have found their gluten free packs to be very tasty, with good sized portions.
Not having been in the shop I can't speak to their set-up.
However the menu has extensive gluten free options and I have not had any reactions so I'd say they seem well set up for gluten free orders.
Healthy options are available too.
— Separate gluten-free menu
— Some
— Good