There is a poster in every location stating what you can have for every allergen imaginable. The pre-made sushi is at risk for cross contamination, as the suhsi is all cut in the same machine and it is difficult to clean. There are other options other than sushi, but they will happily make you fresh sushi, change their gloves and cut it by hand on request. They will also provide you with gluten free soy sauce when you specify that you are gluten free/coeliac. Some staff will answer questions and others refer to the poster. My favourite place to go for sushi.
— Very
— Separate gluten-free menu
— Some
— Excellent