UK Allergen Law When Eating Out: What Restaurants Must Tell You

UK allergen law will not keep you safe on its own. Cross-contamination is not covered, staff training varies wildly, and a printed allergen matrix can be out of date by lunchtime. What the law does give you is a baseline: a right to accurate information before you order, and a clear signal when a venue is not taking that obligation seriously.

This is not legal advice. If you need formal guidance, speak to your GP, allergist, or a qualified adviser. What follows is how the rules work in practice when you are eating out with a severe nut allergy.

The 14 Allergens UK Law Covers

Under UK food information rules, businesses must provide information about these 14 allergens when they are used as ingredients:

• Celery
• Cereals containing gluten
• Crustaceans
• Eggs
• Fish
• Lupin
• Milk
• Molluscs
• Mustard
• Nuts (tree nuts)
• Peanuts
• Sesame
• Soya
• Sulphur dioxide and sulphites (above 10mg/kg or 10mg/litre)

For nut allergy sufferers, peanuts and tree nuts are the obvious ones. But sesame, lupin, and soya appear in sauces, dressings, and baked goods more often than people expect. Ask about all relevant allergens, not just the word “nuts” on the menu.

What Restaurants Must Actually Provide

When you eat in at a restaurant, café, or pub, staff must be able to tell you whether any of the 14 allergens are in a dish. That information can be given:

• Verbally — a server or manager answering your questions
• In writing — on the menu, a chalkboard, or a separate allergen sheet
• By signposting — a notice telling you to ask staff, who must then have the information available

They cannot shrug and say they do not know. If nobody can answer, that is a compliance failure — and a practical reason to leave.

Allergen matrices and ingredient lists

Many chains publish allergen matrices online or in-store. Independent restaurants often keep a binder behind the bar. Ask to see it. Check the dish you want, not just the category. “Salads” as a row is useless if your specific salad contains a nut oil dressing.

If the matrix contradicts what the server tells you, believe neither until a manager reconciles them. Outdated matrices are common after menu changes.

Natasha’s Law and Pre-Packed Food

Natasha’s Law (October 2021) requires full ingredient labelling with allergens emphasised on pre-packed for direct sale (PPDS) food — think sandwiches made on-site and wrapped, salads in grab-and-go fridges, bakery items in bags.

This does not replace the verbal information requirement for made-to-order meals. It does mean you can read the label yourself on PPDS items without relying on a busy counter assistant. Still check: labels get swapped, and “may contain” warnings are voluntary, not part of the 14-allergen mandatory list.

Using the Law Without Being Confrontational

You do not need to quote regulations at waitstaff. A calm, specific request works better:

• “I have a severe nut allergy. Can you check the allergen information for this dish before I order?”
• “Is there a written allergen list I can look at?”
• “Which cooking oil do you use? Are nuts handled on the same surfaces?”

The law requires allergen information, not allergen-free kitchens. A restaurant can legally serve a dish containing nuts at the next table while accurately telling you your chosen dish is nut-free. That is why cross-contamination questions still matter — and why our eating-out plan walks through the full pre-meal checklist.

Where the Law Stops — and Your Judgement Starts

UK allergen law does not require restaurants to:

• Eliminate cross-contamination
• Offer allergen-free preparation areas
• Train every member of staff to consultant level
• Label “may contain” traces (voluntary in most cases)

A venue can comply with the letter of the law and still be unsafe for someone with anaphylaxis. Treat accurate allergen information as necessary but not sufficient. If staff cannot explain how your food is prepared, or the kitchen is visibly chaotic, walk away — see our guide on when to walk away and when to stay.

Frequently Asked Questions

Do UK restaurants have to list allergens on menus?

Not on the menu itself, but they must make allergen information available before you order — verbally, in writing, or via a clear sign directing you to ask staff.

Does Natasha’s Law apply to restaurant meals cooked to order?

No. Natasha’s Law covers pre-packed for direct sale items. Cook-to-order meals fall under the general allergen information requirements instead.

Can I rely on an online allergen matrix?

Use it as a starting point, then confirm on the day. Menus change, substitutions happen, and matrices are not always updated in sync.

What if a restaurant refuses to give allergen information?

You can report food safety concerns to your local authority’s environmental health team via food.gov.uk. More immediately: do not eat there.

What to Do Next

1. Before you go, check whether the venue publishes an allergen matrix online.
2. On arrival, ask to see written allergen information — not just a verbal “you’ll be fine.”
3. Cross-check your dish against the 14-allergen list, including hidden sources in sauces and oils.
4. If anything does not add up, leave. No meal is worth the risk.

For a broader assessment of how to judge a restaurant’s safety culture, read our restaurant safety guide. For the unfiltered practical side of dining out, see the eating out survival guide.

Your health is non-negotiable. The law gives you the right to ask; your instincts tell you whether to trust the answer.