South West Trains continued to run a revised timetable today, with fewer trains across its network.
But the company announced that services will return to normal tomorrow.
SWT operates busy commuter trains to London Waterloo from across the South East.
One hundred flights have been cancelled at Heathrow so far today amid reports that the hub airport is like a "refugee camp".
Drivers are advised to avoid the roads in snowy weather, but here is some advice from the AA on journeys that are unavoidable.