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Fog alert in southern England: 100 Heathrow flights cancelled Fog alert in southern England: Heathrow cancels 100 flights
(35 minutes later)
Flights have been cancelled at Heathrow Airport due to freezing fog covering much of southern England. Flights have been cancelled at London airports as a result of freezing fog covering much of southern England.
About 100 flights have been affected at Heathrow, while Gatwick says it is monitoring the situation. About 100 flights have been affected at Heathrow and London City has cancelled 15 flights.
Dense fog has reduced visibility to 100m at airports across the capital including London City and Stansted. Gatwick says it is monitoring the situation, while Stansted has yet to cancel any flights.
The Met Office's yellow warning for fog - meaning be aware - covers London, the South West, the South East and some eastern parts from 01:00 to 10.30 GMT. The Met Office yellow warning for fog - meaning be aware - covers London, South-West and South-East England and some eastern areas until 10.30 GMT.
Steven Keates, of the Met Office, said there would be "dense freezing fog", particularly in the early hours.Steven Keates, of the Met Office, said there would be "dense freezing fog", particularly in the early hours.
Heathrow warned passengers to check flight updates before travelling. Heathrow, London City and Stansted airports - where visibility is at 100m - have all warned passengers to check flight updates before travelling.
A message on Heathrow's website said: "Foggy weather across London is expected on Monday 23 January and some passengers may experience disruption to their journey as a result."A message on Heathrow's website said: "Foggy weather across London is expected on Monday 23 January and some passengers may experience disruption to their journey as a result."
It added: "Heathrow advises passengers to check their flight status with their airline before coming to the airport."It added: "Heathrow advises passengers to check their flight status with their airline before coming to the airport."
London City Airport said further delays and cancellations were expected due to the foggy conditions.
Luton Airport has yet to cancel any flights, although a few are delayed.
Southampton said it had not cancelled any flights but was monitoring the situation.
It added there could be problems with incoming flights landing later in the morning if the fog remained thick.
On Sunday evening, freezing fog led to two flights bound for Southampton having to divert to Bristol and Bournemouth airports.On Sunday evening, freezing fog led to two flights bound for Southampton having to divert to Bristol and Bournemouth airports.
Airport websitesAirport websites
Bournemouth AirportBournemouth Airport
Bristol AirportBristol Airport
Gatwick AirportGatwick Airport
Heathrow AirportHeathrow Airport
Luton AirportLuton Airport
London City AirportLondon City Airport
Southampton AirportSouthampton Airport
Southend AirportSouthend Airport
Stansted AirportStansted Airport
Mr Keates warned there could also be "difficult driving conditions", with freezing temperatures and a blanket of frost likely to create slippery roads.Mr Keates warned there could also be "difficult driving conditions", with freezing temperatures and a blanket of frost likely to create slippery roads.
He said: "We ask everyone to be aware of the potential impact the fog will have on the roads.He said: "We ask everyone to be aware of the potential impact the fog will have on the roads.
"If you have got an early morning flight, it might be worth double checking, just to make sure there are no delays at the airport.""If you have got an early morning flight, it might be worth double checking, just to make sure there are no delays at the airport."
Temperatures plummeted to -8C (17.6F) in parts of Hampshire and Essex on Sunday morning, the Met Office said.Temperatures plummeted to -8C (17.6F) in parts of Hampshire and Essex on Sunday morning, the Met Office said.
It added that temperatures will struggle to top 0C (32F) in the worst affected areas on Monday.
Driving in fog
Motoring organisation the AA advises:
Travel and weather adviceTravel and weather advice
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Highways EnglandHighways England