The success of the luxury watch specialist’s travel retail business at Heathrow could change Watches of Switzerland’s plan to only focus on the two territories it’s already in and make them look at opening travel stores outside of the UK and US.

“We’re very, very successful at Heathrow so it may well be that we will do something in travel retail. I think that’s the only way we would do something outside the UK or US,” Duffy said.

Although the luxury retailer’s airport business is “growing very fast”, Duffy said the group will continue to focus its attention on growing its market share in USA.