Commuters are enduring another day of disruption as heavy snow continues to disrupt rail services in south London.
Many trains serving London Victoria, Charing Cross and Cannon Street had been cancelled or delayed after up to 15cm of snow fell in places overnight.
Eurostar services have been delayed by up to 90 minutes. But London City Airport reopened at 1400 GMT.
Southern Railway and Southeastern have both said they will be running a much reduced service again on Friday.
Gritters have been out but many roads across south and south-east London are slushy and treacherous.
There are also delays and cancellations to flights at Heathrow Airport.
Forecasters said temperatures would be extremely cold overnight, with widespread ice and freezing fog.
Southern trains began running a half-hourly service from mid-morning between London Bridge and East Croydon.
There were no trains operating south of East Croydon station and the train operator ended services at 2045 GMT.
Southeastern trains is running a contingency timetable with an "extremely limited service" and the company said it expected to do the same on Friday.
Due to the heavy snow there were no First Capital Connect trains between St Pancras and Brighton.
And trains from Waterloo, which serves south-west London, had also been severely delayed on Thursday.
Transport for London's (TfL) fleet of 38 gritter and 10 quad bikes have been spreading almost 2,000 tonnes of grit on roads and pavements on major routes in the past 24 hours.
TfL said bus operators were running the best possible service they could in south-east London where the snow was particularly bad.
A TfL spokesman said: "Transport for London will continue to work around-the-clock to keep traffic in London moving and has deployed extra gritters to the areas most affected."
Schools in Barking and Dagenham, Bexley, Bromley, Croydon, Merton, Sutton and Wandsworth have been closed.