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What Happens Legally If a Customer Has an Allergic Reaction From My Food?
This is the question behind a lot of the anxiety around allergen management, and it deserves a straight answer rather than either scare tactics or false reassurance. Here’s what UK law actually allows for.
The short version
- A serious allergic reaction caused by inaccurate or missing allergen information can lead to criminal prosecution under food safety and food information law, not just a fine.
- In the most serious cases — where a reaction proves fatal — UK courts have brought manslaughter charges against individuals and businesses.
- Civil liability (being sued for damages) sits alongside criminal law as a separate risk entirely.
- Proper training and genuinely accurate allergen information are, by a wide margin, the best protection a business has — both for customers and for the business itself.
The criminal law side
Getting allergen information wrong is a breach of the Food Information Regulations 2014 and can also breach the Food Safety Act 1990’s general duty not to sell food that’s injurious to health. Local authorities can prosecute for this, and penalties scale with severity — from fines through to, in the most serious cases involving death, manslaughter prosecutions against individuals and gross negligence manslaughter against businesses. This isn’t a hypothetical: UK courts have handed down real convictions and prison sentences in cases where a business failed to give accurate allergen information and a customer died as a result.
The civil law side
Separate from any criminal case, a customer (or their family) can bring a civil claim for damages if they were harmed by inaccurate allergen information — this runs in parallel with, not instead of, any criminal proceedings, and doesn’t require a criminal conviction to succeed.
What actually protects a business
The single best protection isn’t a disclaimer or a blanket “may contain” warning — it’s genuinely knowing what’s in your food and communicating it accurately, every time, to every customer who asks. That means proper ingredient records, staff who are trained to actually answer allergen questions correctly rather than guess, and a system (not just good intentions) for keeping that information current when recipes or suppliers change. This is exactly what dedicated allergen training covers.
Why this is treated so seriously
Unlike most food safety failures, a serious allergic reaction can be fatal within minutes, in an otherwise healthy person, from a mistake that’s entirely preventable with accurate information. That’s the reason the law — and the penalties — reflect a level of seriousness that goes beyond most other food safety breaches.
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Frequently asked questions
Can I be personally prosecuted, or just my business?
Both are possible under UK law — individuals (including staff, not only owners) have faced prosecution personally in serious cases, alongside charges against the business itself.
Does having a written allergen menu protect me completely?
It’s a genuinely important part of due diligence, but it only protects you if the information on it is actually accurate and kept up to date — an outdated or wrong allergen menu offers little protection.
What should I do immediately if a customer has a reaction in my premises?
Call 999 immediately if the reaction seems severe (this is a genuine medical emergency, not a customer service issue), then focus on getting them help — the legal and record-keeping side comes after the immediate emergency is dealt with.