23/01/2017 08:07 GMT | Updated 23/01/2017 12:45 GMT

Met Office Issues Weather Warnings For Fog As Heathrow Cancellations And Delays Plague Travellers

It's a chilly one out there.

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An Air Canada 777-333 comes into land through the fog at Heathrow Airport

Flights have been cancelled at London airports as thick fog swathes parts of south and south east England on Monday.

Around 100 flights were affected at Heathrow and London City airport cancelled 15 flights.

Both airports warned passengers to check with their airline before travelling.

Carey Tompsett/PA Wire

One flight was cancelled at Gatwick.

The Met Office had yellow ‘be aware’ warnings in place for the east of England, south west England and London and the south east.

The warnings are in place until 10.30am but freezing temperatures and low winds could see it persist into the afternoon, according to forecaster Mark Wilson.

The chief forecaster’s comments read: “As the cold airmass across much of the south of England moistens up, there will be a much greater risk of fog than on recent nights.

“Areas of cloud trying to advance from the west will add to the uncertainty in extent of fog later in the night and through Monday morning.”

Travellers posted pictures online of the fog...

Jonathan Brady - PA Images via Getty Images
Pedestrians cross London Bridge with the Shard shrouded in fog behind them

The lowest temperature in the UK was in Katesbridge, Northern Ireland, where minus 6.9C was recorded.

The lowest temperature in England was in Northolt, near Heathrow, where a it was minus 6.2C (21F).

Visibility at Heathrow was as short as 100 yards this morning.

The west London hub is particularly badly affected by fog because it operates at 98% capacity, with a plane landing or taking off every 45 seconds.

This means it has less capacity to deal with delays than other airports.

According to BBC weather, temperatures dipped as low as -5C in the south of England.

A spokesperson for Heathrow said: “Foggy weather across the South East has reduced visibility at Heathrow.

“As a result, some passengers may experience disruption to their journeys today.”