Review of Cask N Flagon

I don't want to believe that it was the food... I am recently diagnosed with celiac and actually never really had stomach issues before. Went to cask Friday night after being gluten free for about three weeks (and not eating out).......they assured me they had a separate fryer and the burger bun was gf.... my stomach has been cramped up for two days, just starting to feel better today. Everything tasted great, just not sure how safe it is here for celiacs (especially if you're SUPER sensitive)