York passengers are being warned there will be no direct trains to London during weekend testing.
Network Rail are urging those to check before they travel on Saturday 30 November and Sunday 1 December.
The further digital signalling testing is part of the continuous work on the £1.4bn East Coast Digital Programme.
The programme will see traditional, lineside signals replaced with signalling displayed inside drivers’ cabs, which will mean more reliable journeys and a greener railway for passengers in the future.
For the testing to be carried out under controlled conditions, the railway needs to be closed, affecting long-distance trains in and out of London King’s Cross on 30 November and 1 December.
To travel to and from London, York rail users can utilise a reduced LNER service which will start and terminate at St Neots or Peterborough.
Rail replacement coaches will be running between St Neots and Bedford, where customers can join Thameslink or EMR services to London St Pancras.
Hull trains will also be running a reduced service of two trains in each direction, which will divert and terminate in London St Pancras.
There will be no Grand Central services.
Due to the changes, passengers are reminded to check before they travel and leave extra time for their journeys.
You can check on the national rail website here, or through train operator websites.
Ricky Barsby, Network Rail’s head of access integration, ECDP, said: “The testing work is a further step towards the introduction of digital, in-cab signalling on the East Coast Main Line, which will improve services for passengers and create a more reliable and greener railway.
“We recognise the work will lead to journeys taking longer over that weekend. We thank all those affected for their patience and understanding.”
The East Coast Digital Programme is being delivered in partnership with all train operators which operate on the East Coast Main Line to deliver the first-of-a-kind signalling project.
A spokesperson on behalf of LNER, Hull Trains and Grand Central, said: “Our teams will be working extremely hard to ensure passengers reach their destination as quickly as possible while these upgrades are carried out.
“The latest travel information can be found on our websites and on our social media platforms and we advise passengers to plan ahead and check before they travel.”