In an extraordinary move, the airport published an open letter to airlines and passengers saying it was introducing a capacity cap from today until 11 September.
It said: “Our assessment is that the maximum number of daily departing passengers that airlines, airline ground handlers and the airport can collectively serve over the summer is no more than 100,000.
“The latest forecasts indicate… daily departing seats over the summer will average 104,000 – giving a daily excess of 4,000 seats.