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Trains have been thrown into chaos as thick ice prevents services from running.
Southeastern has issued a do not travel warning for the entire network, with trains in east Kent completely suspended.
No services are running on routes east of Rochester and Ashford, and the Maidstone East line, and there is "severe disruption" in the rest of the county.
A spokesman said: "We are currently experiencing severe difficulties with the train service across our entire network as a result of freezing rain and ice forming on conductor rails, which our trains use to pick up power.
"We are currently advising passengers not to travel. This applies to all Southeastern routes – Metro, Mainline and High Speed.
"We are working to bring services back into operation as soon as possible. We will provide further updates as soon as possible."
Video: What happens when freezing rain hits the third rail
Roads and railways in Kent have been thrown into chaos all week because of the Beast from the East, sub-zero winds from Siberia.
The latest problem comes just after Southeastern had announced, last night, that it was returning a service between Dover and Ramsgate because the area suffered little snow.
Ice has formed today, also making roads and pavements treacherous.
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