My go-to for burgers since my celiac diagnosis. Their whole menu including fries (apart from caramelised onions) can be made GF just by changing the bun. I just had to check the online allergens list. When I ordered in person they asked if my GF request was for allergy or sensitivity and labelled my order very clearly with !!ALLERGY!! which made me feel a lot more comfortable that they would make my food safely. I also order them on Deliveroo which is possibly riskier but the burgers come in completely sealed boxes so they do not touch each other and the fries are GF (and yummy).
— Somewhat
— No gluten-free information on the menu
— Most/All
— Excellent