Coeliac Disease and the Gluten-Free Diet: The Complete UK Guide

Coeliac disease is an autoimmune condition, not a food preference and not a sensitivity that can be managed with a bit of care. When someone with coeliac disease eats gluten — the protein found in wheat, barley, and rye — their immune system attacks the lining of the small intestine. Damage occurs even when there are no obvious symptoms, which is why the word "safe" carries real weight in this context.

What coeliac disease actually is

The immune response in coeliac disease is triggered by trace amounts of gluten, not just a meaningful portion of bread. This is not a dose-dependent intolerance where a small amount is probably fine. It is an autoimmune condition in which the intestinal villi — the structures responsible for absorbing nutrients — are progressively damaged with every exposure. Symptoms vary widely: some people have classic gastrointestinal symptoms (bloating, diarrhoea, pain), others present with anaemia, fatigue, neurological symptoms, or infertility. A significant proportion have no obvious symptoms at all, which is part of why diagnosis often takes years.

Diagnosis requires a blood test (checking for specific antibodies) and, if positive, an intestinal biopsy. It is important not to begin a gluten-free diet before testing, because once gluten is removed the intestine starts to heal and blood tests may return a false negative. Anyone who suspects coeliac disease should speak to their GP and continue eating gluten until testing is complete.

What the gluten-free label actually means

Under UK food law, a product labelled gluten-free must contain fewer than 20 parts per million of gluten. This threshold is established on the basis that the great majority of people with coeliac disease tolerate food at or below this level without intestinal damage. The Crossed Grain symbol, licensed by Coeliac UK, indicates that a product has been verified to meet this standard.

The 20ppm threshold is meaningful, but it does not automatically mean that every gluten-free labelled product is produced without any risk of cross-contamination. A product can meet the 20ppm threshold while still being produced on shared equipment with gluten-containing products. For people with coeliac disease, the production environment matters as much as the finished product composition.

Cross-contamination: what it is and why it matters

Cross-contamination is the transfer of gluten from one surface, utensil, or food to another. Common routes include:

Shared cutting boards, knives, or serving utensils that have been in contact with bread or pastry
Shared cooking water (pasta water, for instance, carries significant gluten)
Airborne flour in a kitchen actively baking wheat products
Shared fryer oil used for both gluten-containing and gluten-free items
Inadequate separation in storage — a gluten-free loaf stored next to an unwrapped wheat loaf

A kitchen that offers gluten-free items but regularly works with flour, pasta, and bread cannot guarantee a coeliac-safe environment without specific protocols: dedicated equipment, strictly separate preparation areas, controlled storage, and staff trained to understand why these separations matter.

The difference between procedural management and structural elimination

This is one of the most useful distinctions to understand when evaluating a caterer or a food supplier. Procedural management means gluten cross-contamination risk is reduced through careful practice — separate chopping boards, labelled equipment, careful sequencing of preparation. This is meaningful, but it relies on consistent execution and is vulnerable to human error.

Structural elimination means the ingredient simply does not enter the facility. A kitchen that physically excludes a substance removes the contamination risk at source. This is the only basis on which a caterer can honestly say "there is no risk of cross-contamination from X" rather than "we take precautions to reduce the risk of cross-contamination from X."

Vanda's Kitchen operates a 100% nut-free kitchen — nuts do not enter the building, which is a structural guarantee for nut allergy. For gluten, however, the honest position is different: gluten is present in the kitchen. Over 60% of the menu is gluten-free by design, and every item carries full Natasha's Law allergen labelling so that gluten-free items are clearly identifiable. But this is a well-managed, clearly-labelled gluten-free range within a kitchen that also handles gluten-containing ingredients — not a dedicated coeliac-safe or gluten-free facility.

How to brief a caterer when coeliac disease is involved

When commissioning catering for an event or a workplace where someone has coeliac disease, the conversation with the caterer needs to go beyond "do you have gluten-free options?" Specific questions worth asking:

Is gluten present elsewhere in your kitchen? If yes, what dedicated equipment and surfaces are used for gluten-free preparation?
How is gluten-free food packaged and labelled? Can items be identified clearly at the point of service?
Do your staff understand coeliac disease specifically? There is a difference between understanding that someone avoids gluten by preference and understanding that a coeliac needs strict avoidance.
Can I see your allergen matrix before ordering? A reputable caterer operating under Natasha's Law should have a full allergen matrix available covering all 14 regulated allergens, with gluten-containing cereals clearly flagged.
Do your labels include precautionary "may contain" statements? These statements indicate that a product may have been exposed to an allergen during production, even if it is not an ingredient. For coeliac disease, a "may contain gluten" statement should be treated as a real warning.

What Natasha's Law requires on labelling

Since October 2021, all food that is prepacked for direct sale — which includes individually packaged corporate lunches delivered to offices — must carry a full ingredients list with all 14 regulated allergens emphasised (typically in bold). This means a coeliac can, in principle, read the label of every item and identify whether it contains any cereals with gluten. The practical value of this is significant for office catering: rather than asking a member of staff or relying on a verbal description, every item carries its allergen status in writing.

The habit of checking the label every time matters. Recipes and suppliers change. A product that was safe on your last order may have reformulated. Checking is not a sign of distrust — it is simply correct practice.

Where to get authoritative coeliac guidance

Coeliac UK (coeliac.org.uk) is the UK's national charity for people with coeliac disease and dermatitis herpetiformis. They maintain a food and drink directory, a venue guide, and detailed dietary guidance. Their app lists restaurants and cafés that have completed their training programme. For anyone newly diagnosed or supporting someone with coeliac disease, Coeliac UK is the right first resource beyond a GP or dietitian.

For genuinely allergen-safe catering across London — independently halal-certified, 100% nut-free and fully allergen-labelled under Natasha’s Law — browse our catering shop or WhatsApp the kitchen.

Frequently asked questions

How do I know your gluten-free items are safe for someone with coeliac disease?

They may not be. Gluten is present in our kitchen — we are not a dedicated gluten-free or coeliac-safe facility. What we do provide is a clearly labelled gluten-free range (over 60% of the menu) with full Natasha's Law allergen labelling on every item, so gluten-free choices can be identified with certainty. For coeliac disease, the decision to eat from our range should be made in the context of that honest information.

What does 100% nut-free actually mean for someone with a severe nut allergy?

It means no nuts enter our kitchen at all — this is a structural guarantee, not a procedural one. We do not use nuts in any dish, and we do not permit them as ingredients from any supplier. For someone with a severe nut allergy, including anaphylaxis risk, this removes the cross-contamination risk at source rather than relying on careful handling of nuts that are present.

How should I tell you about a severe allergy when I order?

State the allergy clearly in writing at the point of order — not as a note added later, but as part of the order itself. Name the specific allergen, note whether it is a diagnosed allergy (immune response, anaphylaxis risk) or an intolerance, and confirm whether an adrenaline auto-injector is carried. This gives us the information needed to advise honestly on which items are appropriate and flag any risk.

Do your labels show "may contain" warnings?

Yes. Every item carries full Natasha's Law labelling including precautionary "may contain" statements where relevant. These statements should be treated as genuine warnings, not boilerplate. If a label says "may contain gluten" on an otherwise gluten-free item, that reflects a real cross-contamination possibility in the supply chain or production environment.

What is the difference between a gluten-free diet for coeliac disease and avoiding gluten by preference?

Coeliac disease is an autoimmune condition in which even trace gluten causes intestinal damage, regardless of whether symptoms are felt. Avoiding gluten by preference or for non-coeliac gluten sensitivity does not carry the same medical stakes. This distinction matters when briefing a caterer: someone with diagnosed coeliac disease needs strict avoidance and honest cross-contamination information, not simply a "gluten-free option" on the menu.