BA chief executive Sean Doyle told the Airlines 2025 conference he supported Heathrow's plan to expand via a third runway, but not at massive cost.
"If you could avoid moving the M25, you should avoid moving the M25," he said, adding: "You should potentially look at building a shorter runway.”
However, in a separate session, Heathrow chief executive Thomas Woldbye claimed there was no alternative. “There is no way we can build a runway the length Sean will need if you don’t move the motorway. There’s a clear plan for it; we build a whole new section [of road] and then move over.”