Heavy snow has led to rush hour travel problems and school closures across south-east England.
This dog was pictured enjoying its first experience of snow
Councils said the main routes in Kent, Sussex and Surrey had been treated overnight. Most of the south coast escaped with either sleet or no snow.
Gatwick Airport's runway was shut briefly on Thursday morning and about 40 flights were cancelled. Train delays and cancellations were also reported.
More than 250 schools across the region were shut because of the snow.
Jack-knifed lorries caused severe problems in Surrey on the A22 at Godstone, around junction six of the M25, and on the A3 southbound at Hindhead.
Motorists are being urged to listen to local radio and TV and to make only journeys that are absolutely necessary.
Snow on minor roads
They have also been told to make sure they are prepared, with warm clothes, food, water, boots, de-icer, a torch and spade, particularly for long journeys.
Police have advised people who are intending to travel to plan their journeys, check their intended route for delays and find out the latest weather information.
Ian Lancefield, from Kent Highway Services, said drivers should take extra care on more rural roads.
"Some of the routes out in the country are dealt with as major routes [and gritted], but some of the minor roads will have snow on them," he said.
Gritting trucks were sent out overnight across the South East
Salting lorries will be out on Kent's roads again on Thursday night, when temperatures are expected to fall below freezing.
Network Rail has warned passengers to check services are running before setting off for their journey on Thursday.
It said railway lines in Kent and Sussex were most vulnerable to snow and ice because they take their power from the rails rather than overhead lines.
Southeastern Railway reported train delays and cancellations because of the snow and points problems.
A Southern Railway spokeswoman said: "We do have train services running across the whole of our network, although there are reported points failures in a number of areas so it is likely there will be delays and problems in the morning."
South West Trains said: "Services are expected to be running OK or with minor delays."
In the event of any power cuts, householders have been reminded to have a stock of torches, candles and matches and to keep a battery radio on standby and mobile phones charged.