If you live with a food allergy or coeliac disease, it's tempting to glance at a restaurant's food hygiene rating and read it as a green light. A 5 feels reassuring. Surely a kitchen that clean has your back?
Not quite. The rating answers a different question from the one you're actually asking. It reflects the hygiene standards an inspector found at the last inspection — how food was handled, what state the premises were in, how well the business could show it manages food safety. It does not certify that a particular kitchen can safely cater for your specific allergy. A spotless place can still be a dangerous one for you, and a 3 can be perfectly safe if the people there know their dishes inside out and take you seriously.
That gap between what the rating measures and what you need to know is the whole point of this guide. Below: what an inspection does and doesn't cover on allergens, the 14 allergens UK law singles out, the labelling rules every business has to follow, and the practical habits that keep you safe at the table.
What the rating actually measures
A food hygiene rating runs from 0 to 5 and rests on three things an inspector checks. How hygienically the food is handled — prepping, cooking, cooling, storing. The physical condition of the premises, including cleanliness, layout and pest control. And how confident the business is at managing food safety, judged mostly by its records, its systems and the answers staff give on the day. You can read the full breakdown on what the hygiene scores mean, or look up any business on our ratings directory.
Allergens do come into an inspection. An inspector will want to see that a business knows which allergens are in its dishes, keeps that information accurate and to hand, and has real steps to stop cross-contamination — separate equipment, sensible storage, staff who've been trained. Strong allergen practice feeds into that third element, the confidence-in-management score. So allergens aren't ignored.
But here's the part worth slowing down for. A high rating is not an allergy-safety certificate. The inspector is judging the kitchen's overall systems, not stress-testing whether it can keep one customer with a severe sesame allergy safe on a busy Saturday night. A restaurant can score a clean 5 and still run an open kitchen where peanuts are everywhere, flour dusts every surface, and one fryer does the lot. None of that drags the rating down — it's hygienic, it's well-managed — yet it might be exactly the place you should avoid. The number is a snapshot of general hygiene at one moment in time. It was never built to speak to your particular allergen. If you want to understand what the inspector is and isn't doing on the day, how food hygiene inspections work goes into it.
The 14 allergens UK law names
UK law requires every food business to tell you when any of 14 specified allergens are used as ingredients. These are the ones most likely to cause a serious reaction, which is why they're singled out:
- Celery
- Cereals containing gluten (wheat, rye, barley, oats)
- Crustaceans (prawns, crab, lobster)
- Eggs
- Fish
- Lupin
- Milk
- Molluscs (mussels, oysters, squid)
- Mustard
- Tree nuts (almonds, hazelnuts, walnuts, cashews and the rest)
- Peanuts
- Sesame
- Soya
- Sulphur dioxide and sulphites (common in dried fruit, wine and some soft drinks)
A couple of these trip people up. Lupin is a flour and seed used in some bread and pastry, more common in continental baking than British, and people rarely see it coming. Sulphites hide in things that don't taste of much — a glass of wine, a handful of dried apricots, a bag of chips treated to stay pale. And "cereals containing gluten" is the legal phrasing that matters to anyone with coeliac disease, though the allergen rules and a proper gluten-free claim aren't the same thing. A business can declare that a dish "contains gluten" while having no system at all to serve someone who can't have a trace of it. If you're coeliac, that distinction is everything. There are short definitions of terms like cross-contamination in our glossary if any of this is new.
The labelling rules, by how food is sold
How allergen information has to be given depends entirely on how the food reaches you. Three categories, three sets of rules.
Loose or freshly made food — a plated meal in a restaurant, a sandwich built to order at a deli counter, a curry from a takeaway — doesn't have to carry a written label. But the business must be able to tell you which of the 14 allergens are in it. That can be on the menu, on a notice, or spoken by staff. If it's verbal, there has to be a clear, signposted way to ask, and the staff have to actually know the answer rather than shrug. A menu line that just says "ask a member of staff about allergens" is fine in law only if that member of staff can really tell you.
Prepacked food sold off a shelf — a wrapped sandwich in a supermarket meal deal, a packet of biscuits — must carry a full ingredients list with the 14 allergens emphasised, usually in bold. This is the labelling you already know.
Prepacked for direct sale (PPDS) is the category that changed. This is food packaged on the same premises before it's ordered — the sandwich a café makes that morning, wraps in clingfilm and stacks in the chiller for you to grab and pay for. Since October 2021 it needs a full ingredients list with allergens emphasised, the same as shelf-bought packaged food. That rule is widely called Natasha's Law, after Natasha Ednan-Laperouse, who died in 2016 after a reaction to a baguette that carried no allergen labelling at all because, at the time, it didn't legally have to. The Food Standards Agency has detailed guidance for each of these categories if you want the letter of it.
Where this gets confusing in real life is the grey zone. A sandwich made to your order, handed over fresh, is loose food — verbal information is allowed. The identical sandwich made an hour earlier and put in the fridge is PPDS and needs a printed label. Same shop, same filling, different rules, purely because of when it was wrapped. You don't need to police this, but knowing it exists helps you spot when a label is missing that shouldn't be.
A scenario worth thinking through
Say you've got a serious peanut allergy and you're choosing somewhere for dinner. You check two places on HygieneCheck. One's a 5, one's a 4. Easy call?
It isn't, on its own. The 5 might be a Thai kitchen where peanuts and groundnut oil are in half the menu and the woks are shared. The 4 might be an Italian place that uses no peanuts at all and trains its staff to flag every allergen. The ratings tell you both kitchens are hygienic and well-run — genuinely useful, and not nothing. But the thing that decides whether you eat safely is the conversation you have once you're there, plus what each kitchen actually cooks with. The rating gets you a shortlist of clean, competent places. It can't pick your dinner for you.
How to stay safe when you eat out
Labelling rules do a lot of the heavy lifting, but your own habits matter just as much. A handful of things that genuinely help:
- Tell them every single time. Mention your allergy clearly, before you order, even somewhere you've eaten happily for years. Recipes change. Suppliers change. The chef who knew your situation moves on. Don't assume last month's safe meal is this month's.
- Ask about cross-contamination, not just ingredients. A dish can contain zero nuts and still be plated with the same tongs, fried in the same oil, or cut on the same board as something that's coated in them. "Is there nut in it?" and "could it pick up nut while you make it?" are two different questions, and the second one is the one that catches people out.
- Push past a vague answer. If someone seems unsure, ask them to check with the kitchen or the manager. A good business won't mind. A staff member guessing to be polite is the situation you want to avoid entirely.
- Trust your gut and leave if you need to. If a place can't give you confident, specific answers about your allergen, walking out and eating elsewhere is a completely reasonable thing to do. You're not being difficult.
- Carry your medication. If you've been prescribed adrenaline auto-injectors, keep two on you — not in the car, not at home. The NHS has clear advice on managing allergies and on what to do during a reaction, and it's worth a read even if you've had your kit for years.
And if a business clearly isn't taking allergen information seriously — no answers, missing labels on PPDS food, staff who brush you off — that's worth raising. You can flag concerns to the local authority; how to report a food business explains the route. It's not about getting anyone in trouble. It's that allergen failures are how people end up in hospital, and councils want to know.
Where this leaves you
The rating and your allergy safety are related but separate things, and conflating them is the mistake that catches people. The score tells you how clean and well-managed a business was at its last inspection — useful for narrowing down where to eat, useless as a verdict on whether the kitchen suits you. For your allergen, the reliable information comes from one place: the people actually preparing your food, asked directly, every visit.
Use HygieneCheck to check a business's latest rating before you go and to browse places near you. Then let the conversation at the table handle the part the rating was never designed to cover — keeping you safe.