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.
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Another cold and frosty night lies ahead, but the winter sunshine prevails for Friday.
Staying cold and frosty with plenty of winter sunshine.
Plenty of sunshine for some, but a little more cloud in the east and feeling cold