The BBC's Neil Bradford sent this picture in. He says: "Control tower barely visible in the fog at Luton Airport. It's quite an eerie feeling hearing planes take off but not being able to see them!"

Image source, PA

Let's hope the ducks on the River Cam can still find any bread thrown their way. 

Image source, PA

The River Cam in Cambridge was shrouded in fog today, making a picture fit for a postcard.  

Image source, Reuters

The scene beside the Thames in London this morning had a distinctly Victorian feel to it, thanks to the weather. 

The situation at Leeds Bradford Airport, external is that no flights have landed yet this morning due to fog. Some flights are leaving, however.

BBC Look East reporter Neil Bradford says Bedfordshire Police dealt with 10 accidents between 06:00 and 10:00 in the thick fog. Three of the incidents were on the M1. London Luton Airport say flights are operating but are subject to delays of 20-30 minutes.  

Easyjet has warned it is suffering "major network disruption today due to poor weather conditions throughout Europe causing low visibility".

Meanwhile, Danny Hesford, from Manchester, has told the BBC he and 18 friends are stranded in Amsterdam.

"We've just heard there are no flights from Schiphol Airport today as the problem has got too big," he said.

Liverpool John Lennon Airport tweeted this image earlier this morning, showing how thick the fog was. 

And the BBC's Ed Thomas has also been putting his video skills to good use this morning, taking this footage from his flight. The capital is down there somewhere...

The BBC's Ed Thomas says, external staff at Heathrow Airport have told him there have been 50 flight cancellations today, matching the 50 cancelled yesterday. 

Who says train companies don't have a sense of humour? 

Image source, PA

Motorists in many parts of the country have had to navigate through thick patches of fog. These drivers are seen passing along the M3 motorway in Hampshire. 

The BBC's Kay Wright has been at East Midlands Airport this morning. She's sent us this photograph, saying: "This is the view at East Midlands Airport this morning. 

"My son's flight from Edinburgh has been delayed by an hour while others coming in from Aberdeen and Northern Ireland were cancelled entirely.

"Staff here say things are getting back on schedule but the fog is still thick enough to not be able to see across car park."

Here's a round-up of the current situation at various airports. 

London City, external has closed to all in and outbound flights until at least 11:00 GMT.  

Heathrow, external is expecting to cancel about 10% of flights on Monday - a spokeswoman said there would be extra passenger ambassadors in the terminals to help travellers.

Manchester, external has cancelled more than 20 flights and Southampton, external more than 20, while problems are also expected at Gatwick, external.

Stansted, external is so far unaffected and is receiving diverted flights from other airports.

Three departures and three arrivals have been cancelled at George Best Belfast City, external airport.

Two flights from Cardiff have been cancelled.

Remember those Met Office warnings about severe fog? To be precise, they cover East Midlands, East of England, London and South East England, North East England, North West England, South West England, Wales, West Midlands,Yorkshire and Humber.

Image source, EPA

It's not just pilots who will be struggling to see through windscreens this morning. Train drivers, such as these in London, are facing the same conditions.

A statement from Manchester Airport says that foggy conditions could remain throughout the morning, and it is asking passengers to check with their airlines about the status of their individual flights. 

"Passenger safety remains our number one priority and we will work with our third parties on site to ensure all passengers are cared for during these conditions," it adds

Image source, PA

Unfortunately for some passengers, their holidays began with a longer than expected queue at the airport. These passengers were waiting at Heathrow's Terminal 5 earlier this morning. 

Merseytravel is reporting, external there will be no commuter ferries across the Mersey in Liverpool until further notice, due to the fog. Whatever would Gerry and the Pacemakers say?

A five-year-old girl has been found with her dead father in a crashed car which had been in a ditch "for some time", according to West Midlands Ambulance Service.

It said the car was discovered on Sunday at 09:35 GMT by two cyclists in Crakemarsh near Uttoxeter, Staffordshire.

The black Ford Fiesta appeared to have hit a tree in very foggy conditions on the B5030. The girl, in the back of the car, has been treated at hospital for minor injuries.