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Heathrow and London City Airport flights disrupted by fog Heathrow and London City Airport flights disrupted by fog
(about 2 hours later)
Thick fog has disrupted flights to and from Heathrow and London City airports. Thick fog and ice is causing disruption to flights in and out of some airports.
At London City Airport, at least 18 services were cancelled as temperatures fell below freezing. London's Heathrow Airport said more than 20 flights on Wednesday had been cancelled and further cancellations and delays were expected.
There have also been a number of cancellations and delays at Heathrow and the Woolwich Ferry service in London stopped earlier than normal. The Met Office has issued a yellow warning of fog for parts of England and is advising people of reduced visibility and the risk of disruption.
In the worst affected areas, visibility will be less than 100 metres, the Met Office said.
The warning - covering the period until 11:00 GMT on Wednesday - warns of dense and freezing fog across much of central, eastern and north-west England, as well as London.
On Tuesday evening, a spokesman for Heathrow Airport said: "Some flights have been cancelled and some are being cancelled tomorrow morning because of fog.
"It's better to cancel flights when there's fog because you can't land as many planes per hour because you have to leave more space between the planes."
Cancelled flights included scheduled trips to Warsaw, Nice, Stockholm, Aberdeen and several German cities.
At London City Airport, at least 18 services were cancelled on Tuesday as temperatures fell below freezing.
Passengers have been advised to check with their airline before travelling to the airports.Passengers have been advised to check with their airline before travelling to the airports.
BBC London's meteorologist Peter Cockroft said temperatures would fall much further overnight, causing dense fog which would be slow to clear in the morning. BBC London's meteorologist Peter Cockroft said temperatures would fall much further overnight, causing dense fog which would be slow to clear in the morning
A spokesman for Heathrow Airport said some airlines had already made the decision to cancel some flights on Wednesday because of the weather.
He said a relatively small number of night flights had been cancelled and "tactical" cancellations had been made to minimise disruption on Wednesday.