In an attempt to keep travellers up to date with the latest flight disruption at Heathrow, BAA has published a list of flights that "airlines have told us they plan to operate today".
The airport operator has posted a link on its homepage to a PDF detailing flights likely to depart and arrive today (Tuesday December 21), along with the following advice:
"Heathrow is operating a reduced flight schedule today, Tuesday 21 December. Please click here for a full list of the flights that Heathrow's airlines have told us they plan to operate today.
"If your flight is not on this list, it is unlikely it will operate today. Please do not travel to the airport unless your airline has confirmed you will be able to fly.
"If your flight is on the list, please contact your airline for confirmation before leaving for the airport.
"Further snow is forecast across Europe today and there may be further delays and cancellations.
"You can also check the live flight information board below which shows the current status of each flight. If the flight status shows ‘contact airline’, your flight will not be operating today.
"Regular updates will be provided on this site, via Twitter, our iPhone / Android mobile apps and our flight text service.
"We are truly sorry for the disruption the weather is causing to our passengers. We are doing everything we can to get you on your journey."
Meanwhile Gatwick airport is now open, having closed last night due to fresh snowfall. But the airport advises that "some knock-on delays and cancellations are likely throughout the day, due to the ongoing impact of snow across Northern Europe.".
And Eurostar has posted advice on its homepage, asking "all customers booked to travel before Christmas to refund or exchange their tickets free of charge, if their travel is not essential." Those travellers with confirmed bookings whose travel is essential are warned that "seats will be allocated to you on the next available service but this may mean waiting for more than 3 hours".