Thousands of air passengers were delayed at Heathrow tonight after technical problems with the air traffic system stopped flights leaving the airport.
The computer glitch means passengers have faced delays which are now easing.
Currently some flights are an hour late. Services should be normal in the morning. National Air Traffic Services has just issued the following statement.
More top news
Simon's Blog - All Creatures Great And Small!
Tuesday night's weather with Simon Parkin
Tuesday afternoon's weather with Simon Parkin