London’s commuters faced more rush hour chaos as five Tube and Overground lines were hit by major delays after heavy snow blanketed the capital.
Commuters battling to get home faced delays on the Piccadilly, District, Circle and Central lines and the London Overground amid the big freeze.
Transport for London also warned of major disruption on many bus routes due to Arctic weather and urged passengers to check their journeys before travelling.
Emergency engineering work at King’s Cross sparked severe delays on the entire Piccadilly line.
Further delays were sparked by a “number of weather related issues”, Transport for London said.
Central line services were severely delayed between North Acton and Ealing Broadway and Leytonstone and Epping due to faulty trains.
Major delays were expected on the London Overground between Watford Junction and Euston due to a signal failure.
A faulty train has caused minor delays between Willesden Junction and Clapham Junction.
Commuters using the District line faced minor delays between Edgware Road and Wimbledon due to a signal failure at High Street Kensington.
All services from High Street Kensington were disrupted. A good service resume on the Circle and District lines from shortly after 5pm.
A spokesman told the Standard: “Although the majority of our services are running normally, the current freezing temperatures and snowfall are affecting some of our Tube, bus and rail services.
“Our staff are working hard to minimise the impact and have all services back to normal as quickly as possible. I apologise to customers for the disruption to their journeys. We ask people to check before they travel.”
Sub-zero temperatures have gripped the capital during a week-long cold snapped dubbed the Beast from the East prompting nationwide travel chaos.
Rail passengers across Britain suffered from delays and cancellations on Wednesday, with almost all operators affected by the conditions.
And National Rail warned of disruption to trains, with affected lines including c2c, Gatwick Express, Grand Central, Greater Anglia, Hull Trains, London Overground, Northern, South Western Railway, Southeastern, Southern, Stansted Express, TfL Rail, Thameslink, Virgin Trains, Virgin Trains East Coast.
The West Coast Main Line was closed between Carlisle and Scotland with no trains or replacement buses.
Alternative rail routes between England and Scotland wee also severely disrupted.
Dozens of Southeastern services were unable to run due to problems in several locations.
A snow clearing vehicle broke down and blocked the Ashford-bound line at Wye, while there was major disruption on routes between Dartford and London via Woolwich, Bexleyheath and Sidcup because of signalling faults caused by the weather.
Delays and cancellations on the c2c line from south Essex into London Fenchurch Street were worsened by freezing doors which prevented some passengers getting on and off trains.
All Caledonian Sleeper services between London and Scotland due to depart on Wednesday night were cancelled.
ScotRail urged commuters in the red warning area to head home as services will wind down on Wednesday afternoon.
Virgin Trains East Coast lifted its ticket restrictions for services on Wednesday, Thursday and Friday.
Police closed large sections of major routes as several roads were left impassable following heavy snowfall.
The worst areas are Kent, East Anglia and north-east England, but problems are spreading.
Air passengers also faced chaos amid cancellations of flights in and out of Heathrow, with British Airways axing at least 103 services on short haul routes.
London City Airport saw at least 98 flights cancelled. An additional six inbound flights were diverted or returned to their departure airports.
BA’s business class only service from New York to London City was forced to land at Gatwick, West Sussex, while the carrier’s flight from Frankfurt ended up touching down in Birmingham, 110 miles away.
All flights due to land at Leeds Bradford Airport before 4.30pm were either cancelled or diverted, and many departures were also unable to operate.
Shortly before noon Ryanair suspended all flights to and from Dublin Airport for the rest of Wednesday as a result of the snow which swept into Ireland overnight.
Glasgow Airport closed its runway from around 7am until 1pm.
Gatwick Airport said flights were arriving and departing, but some flights were disrupted.
For the latest in realtime advice and travel updates visit www.tfl.gov.uk and also use our live update services @TfLTravelAlerts, @TfLTrafficNews and TfLBusAlerts on Twitter.