Think about how a group of friends, family or colleagues decides where to eat together. Someone makes a suggestion. Others weigh in. A booking gets made.
Now add one variable: someone in the group has a food allergy, intolerance or diet.
That person doesn't just weigh in. They become the deciding factor.
How the decision works
When someone in a group has a food requirement, the restaurant decision changes shape. There's no longer a loose consensus process where anyone can suggest anywhere. There's a practical filter before any suggestion makes the shortlist: can the person with the restriction eat there?
They're the one who knows what to look for, who checks the menu before anyone else, who calls ahead if necessary, who has opinions about which restaurants are reliable and which aren't.
If a restaurant makes it onto their shortlist, the group can go there. If it doesn't, it's not an option, regardless of how much everyone else might want it.
This is the veto: a practical reality that one person's dietary need shapes where the entire group eats.
The numbers behind it
The Natasha Allergy Research Foundation's research puts a specific figure on the scale of this: 48% of UK households include at least one person who avoids certain ingredients.
The implication for a restaurant isn't just about the individual customer with the allergy. It's about every birthday dinner, every work lunch, every family meal, every group of friends that includes someone who has to think carefully about what they eat. Those groups are choosing between restaurants. And the person with the allergy, intolerance or diet is making that choice.
The invisible loss
A group of six friends are planning a birthday dinner. One of them has a nut allergy. She checks the menus of three restaurants they're considering. Two of them have no allergen information on their websites. The third has a full digital menu with allergen filters.
She books the third one. Her five friends, who had no strong preference, are now also booked to eat there.
The first two restaurants never find out she looked. They don't see the lost booking. They don't know that the absence of allergen information on their website cost them a table of six.
It's invisible to the restaurant. The customer with the allergy doesn't write a review saying "I didn't come because I couldn't find allergen info online." They just don't come.
The opportunity
The veto works the other way too. A restaurant that makes food information accessible earns something all restaurants crave: the repeat booking, the word-of-mouth recommendations, and the loyalty that comes with being one of the few places someone can trust.
The standard metrics of hospitality focus on covers per sitting, average spend, return visits. The far less asked question is how many bookings did we lose because the person with a food restriction in the group couldn't find what they needed.
What a restaurant needs to be in the consideration set
For the person with the food allergy to consider a restaurant, they need one thing before anything else: the ability to check whether eating there is feasible.
That means allergen information available before they arrive. Not a spreadsheet behind the bar. Not "call us and we'll check." Information they can access on their phone, from the website, without needing a conversation first.
This is the entry requirement. The difference between being in someone's consideration set and not being in it at all. The quality of the food, the atmosphere, the price point: none of that matters if they can't determine whether the food is safe before they book.
A restaurant that clears this bar becomes an option for a large number of groups that currently won’t even begin to consider it.