Widespread travel chaos caused by the severe winter weather continues to leave commuter plans in tatters and swathes of the country paralysed.
Delays and cancellations at a host of UK airports continued to hit thousands of passengers, while plummeting overnight temperatures left almost the entire road network caked in treacherous black ice.
After shutting on Saturday, Heathrow said it would not be letting any flights land on Sunday, with only a "handful" of departures taking place, pouring misery on hundreds of stranded people who were forced to spend the night in terminals.
Gatwick Airport reopened after planes were grounded for large periods on Saturday, but widespread disruption was expected with officials advising passengers to check with their airline before travelling.
Stansted, Luton, Exeter, London City, Aberdeen, Birmingham, Bristol, Southampton, Cardiff and Birmingham airports also said flights would be subject to delays and cancellations.
A spokeswoman for Heathrow, which experienced temperatures of minus 5.2C overnight, said: "We are extremely sorry for the disruption this will cause to passengers and airlines and we stress that passengers must check with their airlines before travelling to the airport. We will provide regular updates.
The airport said several hundred people were working to treat airside areas and keep passengers in the terminal as warm and comfortable as possible.
"Safety is our first priority and we hope this course of action will allow us to offer a fuller service to passengers and airlines using Heathrow tomorrow," added the spokeswoman.
