Passengers on trains and hundreds of motorists were left stranded overnight as strengthening winds caused blizzards and drifting snow across the UK.
It comes as forecasters warned the country "is not out of the woods yet".
Air passengers are facing travel chaos in Scotland after the extreme weather grounded flights to and from Glasgow and Edinburgh.
Glasgow Airport was forced to shut until at least 3pm on Thursday after initially suspending operations until 11am.
Edinburgh Airport said that most airlines had cancelled all their operations until at least lunchtime.
People flying from the capital were warned to expect a "large number" of delays and cancellations.
Two separate South Western Railway trains broke down - and passengers were left with no water, food or heating for more than 12 hours.
A red "danger to life" weather warning has been issued in the south west and Wales as the region braces for up to 50cm of snow.
A man has died after being pulled from a lake in south east London.