The Allergy the Booking Doesn't Mention
The booking note is blank. Name, party of two, 7pm. The first thing the couple says when they sit down is that she is coeliac.
That is the allergen conversation in a working kitchen in 2026. Not flagged in advance. Not in the system when the prep was planned. Discovered at the table, after service has started and the kitchen has already committed to everything it made that afternoon.
The server goes back to the pass. The head chef runs through which dishes carry gluten, which can be adapted, which cannot be touched because something else on that section of the board has been in contact with bread. It takes four minutes. The cover is not seated until eight. The table next to them, who have been waiting for their bill, is still sitting there because the floor is managing two things at once.
Four minutes is not a crisis. Multiplied across a service with three or four tables carrying a requirement, it changes the rhythm of the room.
What the law requires
The Food Information Regulation 2014 established the baseline. Every food business operating in the UK must provide allergen information for any of the 14 major allergens present in the food it serves: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, peanuts, sesame, soybeans, sulphur dioxide and sulphites, tree nuts. On every dish. Available at the point of ordering.
Natasha's Law, which came into force in 2021, extended full ingredient labelling to pre-packed food sold directly to consumers: sandwiches, salads, anything made on site and sold chilled. The same allergen standard, now printed on the packaging.
The FSA's updated best practice guidance for 2025/2026 goes further than minimum compliance. Written allergen menus, clearly labelled dishes, or digital tools accessible at the point of ordering are what the standard now describes. The legal floor is one thing. Operating safely, at a level that protects a diner with a serious allergy and protects the kitchen from the risk that goes with a mistake, requires more.
How many people this applies to
The FSA estimates that around 2 million people in the UK live with a diagnosed food allergy. A further 6 million have a food intolerance serious enough to shape what they order. On any full service in a busy dining room, multiple tables are navigating a restriction the kitchen has to accommodate.
This is not a fringe consideration. It is a structural feature of who walks through the door, and who does not book in the first place when a menu or a restaurant does not look like it will take dietary needs seriously. The diner who can see clearly that a kitchen has its allergen information in order is the one who actually makes the reservation. The one who cannot tell is the one who goes somewhere else.
The cost that does not make the budget headlines
Every conversation about the pressures bearing down on hospitality focuses on the same items: VAT at 20 percent, the rising wage floor, employer National Insurance, business rates. These are the right items to focus on. They are also the ones with lobby groups, press offices, and P&L lines behind them.
Allergen compliance does not appear on those lines. It shows up in the cost of training a floor team to communicate dietary information accurately and calmly under pressure. In the time a head chef spends updating documented allergen information every time a supplier changes an ingredient or a dish changes its recipe. In the cross-contamination protocols that a kitchen running at pace has to hold in its head alongside everything else. In the additional care that goes into every service where the kitchen is working around a restriction, because the risk of getting it wrong is serious.
We run kitchens across Sussex: the Castle Inn, Tollgate, the Bull on the Green, the Berwick. The allergen conversation is in every service. It runs on days when the book is full and the pass is moving fast, and on Tuesdays when there are four tables in and all of it still applies.
What the empty seat pays for
All of these costs are fixed. The training happened regardless of how many covers last Thursday ran. The documentation is current whether anyone requests the allergen information tonight or not. The protocols the kitchen holds are the same for a full room as for a quiet one.
The empty seat at 4pm has already absorbed its share of that overhead. It contributed nothing to covering it.
Around 4pm, when the shape of the evening becomes clear, venues release on Halfseat the tables they expect to lose. Food at half price. Drinks at full price. A real cut of the booking fee going directly to the venue.
The allergen question the booking did not mention will be asked at the table. The kitchen that has the answer already documented, already part of how the room runs, seats the cover quickly and correctly. The cost of that documentation is fixed.
The seat that earns nothing still runs the same overhead as the one that fills. The only variable is which one ends up in the column that matters.