Heathrow expects fog to lift as 'visibility is improving'
– Heathrow spokeswomanWe expect the fog to lift between 9am and 10am. Visibility is already improving.
There have been some delays as well as cancellations. There is bound to be a bit of a knock-on effect during the day. Also, some European airports are also affected by the cold weather
Clear skies and light winds: The perfect recipe for fog
Clear skies and light winds are a recipe for fog to develop, so allow extra time to defrost your car and check before you travel.
What's behind the current cold snap?
It's another bitterly cold day today. It's all down to where the air originates from - and today's can be traced back to Russia.