The Cost Of The Ash Cloud Crisis
More than 1 and a half million fewer passengers used Heathrow and Stansted airports in April because of the volcanic ash cloud crisis.
The owner of the airports, BAA, reckons the airspace shutdown has cost it 28 million pounds.
It comes as demolition work starts on Heathrow's Terminal 2.
It's part of a 1 billion pound redevelopment.
Terminal 2 was the first terminal building opened at the airport over 50 years ago - when it re-opens in 2013 - it'll be able to handle 20 million passengers.