British Airways is to boost capacity on its Boeing 777 economy class flights by adding an extra seat to each row.
The aircraft currently has nine-across seating in a 3-3-3 layout, but the new proposals would create an extra 52 seats in the cabin.
"We are flying more customers than ever before to our expanding network of destinations," a BA spokeswoman said.
"To meet this demand, we are updating our Boeing 777 cabins to bring us into line with many of our competitors and allow us to offer even more low fares."
The extra capacity is expected to come in March 2018. BA added that the economy cabin will be fitted with new entertainment systems with bigger screens.
Willie Walsh, chief executive of BA’s parent company IAG, told investors: "We’re responding to a market opportunity."
He said the move would allow BA to “lower the average cost per seat, charge a lower price and stimulate demand”.