Bank holiday journeys affected by rail works
Network RailTrain passengers are being warned of revised services and replacement bus services between Peterborough and London due to engineering work during the August Bank Holiday weekend.
The work will affect journeys south of Peterborough and Royston between 22.00 BST on Saturday 29 August and 08.00 on Monday 31 August.
Network Rail said passengers might be able to avoid the disruption by travelling before or after Sunday.
It added that in-cab signalling would replace traditional lineside "traffic light" signals with real time information sent directly into the driver's cab and that in the long term it would "deliver more reliable, greener and safer journeys".
The work forms the final stages of testing ahead of the £1.4bn East Coast Digital Programme's introduction of digital in-cab signalling.
Ricky Barsby, head of access integration, said: "The work taking place involves the final preparations for us to begin a gradual introduction of digital in-cab signalling on the East Coast Main Line.
"The ability to control trains in this way will enable a more resilient and reliable railway that is fit for the future."
A train operators' spokesman said: "We've worked closely together and with Network Rail to keep our customers moving and minimise disruption wherever possible.
"We encourage customers to plan ahead and check their journey before travelling so they can choose the option that best suits them."
Passengers are advised to check their train operator's website and social media for the latest travel advice, including Grand Central, Great Northern/Thameslink, Hull Trains and LNER.
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