Leon Restaurants will open at Heathrow Airport’s new Terminal 2 next year as part of its drive to accelerate expansion.
The airport unit will take the healthy fast food chain to 14 sites.
The Heathrow restaurant, to be run by franchise operator HMS Host, will occupy a unit close to the security area.
The company was founded in 2004 when Henry Dimbleby, John Vincent and Allegra McEvedy started a restaurant on Carnaby Street in central London.
Chief executive Henry Dimbleby said: “When we started Leon we wanted to revolutionise fast food. We wanted to make it easy for everyone to eat good food.
“We are thrilled that Leon is the only fast-food restaurant in T2 and occupies such a prominent spot. It proves that it is possible not only to serve fast food that tastes good and does you good, but to do it at a price that is accessible to everyone.”