Based on previous experience with sub-zero conditions, you might expect London's transport network to be struggling. Yet reports suggest that most services are doing just fine, and are no more delayed than normal.
Road transport is perhaps in most jeopardy, as the continued freeze causes potentially dangerous driving and cycling conditions. Inner London seems to be in pretty good shape thanks to a robust gritting operation, but minor roads may still be hazardous, and some pavements will be dangerously icy.
Tubes are doing surprisingly well. Only the Met Line is wheezing in the cold, with the southbound line between Amersham and Moor Park closed. Minor delays are also affecting the Circle and Hammersmith & City lines. There are few major problems on mainline trains, although SE Trains are reportedly rammed and delayed. Eurostar is now running again but on a reduced service.
The airports are all open, but some delays to flights are expected.
The best way to stay up-to-date with London travel is to follow @BBCTravelAlert.
Image by Gary8345 in the Londonist Flickr pool.