Heavy snow has caused disruption across Norfolk, with flights cancelled, trains delayed and some roads gridlocked.
The Association of Train Operating Companies said 20% of trains were delayed because of the weather.
Rail travellers lodged a record number of complaints - more than after the Hatfield disaster, when trains were delayed by massive repair programmes.
Rail operator Southeastern said trains had been delayed or cancelled and ferry companies also reported disruption.
Those on delayed trains reported being stuck on hot trains for 90 minutes and more.
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Peak season means queues in the harbour, delays at the dock, congestion on the freeways, and delayed trains carrying containers inland.
Dense fog caused travel chaos with trains and planes delayed.
Between October and the end of December almost 1, 000 trains were cancelled or delayed due to driver shortages.
South West Trains says there is disruption across its network with a number of trains cancelled and others delayed by up to an hour.
Dozens of trains were also cancelled or delayed due to the poor weather.
Domestic rail services across the UK were also delayed and buses replaced trains in many areas.
Slough MP Fiona Mactaggart was responding to figures showing one in four rush hour trains between November and January were delayed.
BBC: Slough MP Fiona Mactaggart wants rush hour train changes
Trains between Oxford and Didcot Parkway are delayed by up to 40 minutes due to flooding in the Oxford area.
Greater Anglia trains between Norwich and London are being delayed after a car slid on to a rail crossing in Suffolk, but Norwich Airport has now reopened after being shut for 24-hours.
Heavy snowfall on Friday afternoon led to trains between London Kings Cross and Peterborough being delayed.
BBC: Cambridgeshire Police warn of ice patches on some roads
Virgin Trains said services between Rugby and London Euston may be delayed by up to 45 minutes until further notice.
Trains running on various routes in and around the Birmingham area were delayed by up to an hour.
Trains run by CSX, America's third-largest railway company, were cancelled or delayed after it struck.
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