Surrey snow: Further disruption expected
Gritters will be out in force after a day of snow caused the closure of 233 schools in Surrey and led to widespread travel disruption.
Surrey County Council said its fleet of 39 gritters will be treating priority routes, with the Highways Agency gritting motorways in the county.
However, Surrey Police said motorists should only make essential journeys.
Heathrow Airport cancelled 404 flights on Friday but said it hopes to run a normal service on Saturday.
The airport said there might be some disruption caused by services rolling over from Friday.
Gatwick Airport said it had suffered minimal disruption, praising its new fleet of snow clearance vehicles.
However, it advised passengers to check the status of their flight with the airline before travelling to the airport, and to allow extra time for their journey.
South West said it will be running an amended timetable again on Saturday, however, Southern said it hoped to run services as planned.
The Met Office said further snow is predicted in Surrey overnight and into Saturday morning.
BBC South East weather presenter Kaddy Lee-Preston said freezing temperatures would remain across the weekend "with many places struggling to reach even +1C and feeling bitter in the strong winds".
She said temperatures would fall on Friday night to -3C and further snow showers would give a potential for 1 to 2cm.
"Ice is also a concern and surfaces will be prone to ice throughout the weekend."
Many places will not see any snow on Saturday, although there is a chance of a few flurries which could amount to a further 2cm.
"On Sunday there is a weather system moving up from the continent which could give large amounts of snow.
"Details are difficult to pinpoint at the moment but it's the type of situation where we could get 5cm or more of snow," she said.