Network Rail and train operators have thanked passengers for their patience as a major programme of East Coast Main Line (ECML) engineering works reaches its halfway point. The upgrades—focused on improving reliability, safety, and long‑term performance—are being delivered over four weekends across March, with significant progress recorded on both infrastructure renewals and digital signalling.
Work between York and Newcastle has been occupying two weekend blocks, while Sunday 15 March included critical testing for the East Coast Digital Programme (ECDP) in Hertfordshire.
Extensive Track Renewals Continuing Over Coming Weekends
Over the next two weekends, engineers will complete:
- Further track renewal at Low Fell, south of Newcastle
- New track installation plus switches and crossings renewals at Northallerton
Throughout the works, most passengers travelling in the north‑east will still have access to an hourly service via a diversionary route linking York and Newcastle through Sunderland.
Rail replacement buses will be in place for those travelling to or from Darlington and Durham, connecting into trains at York or Newcastle.

Gunnar Lindahl, joint operations director for Network Rail and LNER, said:
“We’re carrying out a significant package of upgrades on the East Coast Main Line to keep trains running safely and reliably for the millions of passengers who depend on the route. We appreciate this work does mean changes to weekend services, and we’re grateful to passengers for their patience while we complete these upgrades.”
Progress Delivered During Early March Works
The first two weekends of work (7–8 and 14–15 March) saw substantial engineering milestones achieved, including:
- Renewal of switches and crossings at Croft, south of Darlington
- New track plus switches and crossings renewals at Cowton, between Northallerton and Darlington
- Track renewal at Low Fell
- 1.3km of rail renewal and removal of disused assets at Aycliffe, north of Darlington
- Installation of overhead line equipment and points for the Darlington station upgrade

Digital Signalling Moves Closer to Passenger Operation
On Sunday 15 March, the ECML modernisation also advanced significantly as ECDP testing took place between Welwyn Garden City and Hitchin. The testing forms part of the £1.4bn programme to introduce digitally signalled passenger services later this year—offering more reliable, greener and safer operations.
The tests focused on integration between lineside systems, onboard equipment, and York Rail Operating Centre.
Ricky Barsby, Network Rail’s head of access integration for ECDP, said:
“We thank passengers for their patience while further rigorous testing work took place. We’re pleased to have completed this season of ECDP work as spring now gets under way. The work we’ve done has prepared the railway for a change in how we operate services – one that will deliver more reliable, greener and even safer services for the long term.”
Raj Patel, who leads Govia Thameslink Railway’s digital signalling team, added:
“We made excellent progress, testing integration across all the elements of the European Train Control System that underpins digital signalling. We’re looking forward to using the technology in passenger service later this year, taking us closer to full transformation of the southern section of the East Coast Main Line between London King’s Cross and Grantham.”
Image credits: Network Rail