King's Cross station in central London has reopened after closing for hours due to "overcrowding" as Storm Babet bore down on the country and caused severe disruption to rail services.
The station allowed people to leave but not enter as a "temporary" measure on Saturday due to disruption to LNER services.
Crowd control measures introduced after swarms of people gathered on the concourse and platforms have since ended, Network Rail said in an update just before 5.30pm.
"Temporary crowd control measures have been removed but some train operators are advising passengers to not travel today," it said on X, formerly Twitter.
Earlier Network Rail said Storm Babet brought "severe disruption to the rail network".
Routes affected included LNER services between Inverness, Aberdeen, Glasgow Central, Edinburgh, York, Leeds, Harrogate, Lincoln and King's Cross.
Network Rail had warned that trains running to and from King's Cross may be cancelled, delayed or revised and major disruption is expected until the end of Saturday.
On its website it said: "Severe weather is causing major disruption to services across the LNER route. Many rail routes are suspended due to flooding and an extremely limited service is in operation.
"We also expect services to be disrupted throughout Sunday and would advise that customers check before they travel."
There are no LNER services operating north of Edinburgh towards Aberdeen or Inverness in either direction, and the line between Doncaster and Leeds is blocked due to flooding.
Following disruption on Friday, crews and trains are "displaced across the country" and services are subject to short-notice cancellation, Network Rail added.
Due to road closures, rail replacement is not available. Other train operators are also subject to disruption and alternative routes are also blocked.
Today at king’s cross ! I left as they shut the station and staff manning doors to stop people coming in. They had to unlock it to let me out. At 2 mins to 12! pic.twitter.com/jeyxfS8z8D
— Rosie Coleman (@RosieColeman61) October 21, 2023
Affected customers were advised to use their train ticket at no extra cost on the Underground and buses between Finsbury Park and central London.
Train operators around the UK have urged customers not to travel on Saturday due to widespread disruption after Storm Babet.
London North Eastern Railway (LNER), Avanti West Coast and Northern Rail have all warned against travelling as lines are widely flooded.
Photos posted to social media show swarms of people waiting for trains at King's Cross, while thousands packed platforms on Underground lines across London as they arrived to attend a pro-Palestine march from Marble Arch.