Those airports that have reopened are operating limited and delayed services and travellers are advised to check with their airlines.
About 5% of train services have been cancelled and a third ran late during the first half of the day, with Channel Tunnel high-speed train company Eurostar axing four services.
There are currently no trains running between Glasgow-Edinburgh, Perth-Inverness, Carlisle-Edinburgh, Sheffield-Leeds and Portsmouth Harbour-Guildford.
SHOOT: It's interesting that airlines are having to deal with no only high energy prices in the foreseeable future, but also bad weather. Bad weather results in cancelled flights which results in lost revenues which airlines can ill-afford. Best to invest in trains - less in airlines and in road transport.