Rail passengers are facing disruption to and from London while King’s Cross Railway Station is closed for engineering works.
There are no trains in either direction on the East Coast Main Line line south of Peterborough, including to Stevenage, while engineers upgrade signalling system as part of a £1.2 billion project.
Services run by LNER, Grand Central, Great Northern, Hull Trains and Thameslink are also affected.
It is only the second planned shutdown of all lines between the London station and Peterborough in two decades, Network Rail said.
Passengers are being urged not to travel, and those who do are advised to allow “significantly more time for their journeys” as alternative routes and rail replacement buses are expected to be “incredibly busy”.
London King’s Cross was modernised in 2012 but the track and signalling layout have not been improved in more than 40 years.
Ed Akers, principal programme sponsor for Network Rail, said: “This weekend, we are continuing with vital work on the £1.2 billion east coast upgrade, which is the biggest investment into the line in a generation.
“We are urging passengers to heed the advice issued which is not to travel to/from London on the East Coast Main Line this weekend.
“We know that this is disruptive and we do apologise for this. Unfortunately, it is necessary to enable us to progress on this work, which will create more services, faster services and thousands more seats for passengers.”
The station will also close on the weekend of February 29 and March 1 for further work.
