They have gluten free bagels and staff are very knowledgeable although it might depend who is on duty. I asked for the allergen menu which is quite detailed, breaking down all the ingredients with their allergens. Went with the safest option which was a plain bagel with cheese cream. When asked for the omelette bagel they advised against it due to contamination (not exactly sure why but I took their advise)
If I had to suggest something, it's for the waiters to bring food on a separate dish to avoid cross contamination