Network Rail has outlined plans for a significant programme of infrastructure investment on the North Wales Coast line, with extensive engineering work proposed between Chester and Holyhead in January 2027.
The scheme, part of the broader Network North Wales investment initiative, is designed to enhance rail reliability, increase capacity and improve accessibility, while supporting rising demand for sustainable transport across the region.
Continuous Closure to Enable Faster Delivery
Under current proposals, the line will close continuously for up to four weeks in January 2027. Network Rail says this approach will allow engineers to deliver a comprehensive package of upgrades more safely and efficiently than traditional phased possessions.
The planned works include:
- Track renewals to improve ride quality and reliability
- Drainage enhancements to reduce weather-related disruption
- Vegetation management
- Installation of two fully accessible footbridges at Prestatyn and Pensarn
The new footbridges are expected to provide safer and more inclusive routes across the railway for local communities, aligning with wider accessibility goals across the UK rail network.
Building on Timetable Enhancements
The investment programme follows the introduction of the new North Wales timetable in May 2026, which delivered a 50% increase in Transport for Wales services—marking a generational shift in regional connectivity.
Together with new rolling stock and bus integration initiatives, the works form part of a wider strategy to create a more cohesive and resilient transport network across North Wales.
Why January?
Network Rail has identified January as the least disruptive period for such a major intervention, citing reduced tourism activity and seasonal closures of local attractions and holiday parks.
By adopting a continuous closure model, the organisation aims to:
- Shorten the overall programme duration
- Reduce long-term disruption compared to repeated weekend/overnight works
- Lower delivery costs
- Maximise the scope of improvements delivered in a single possession
Rail replacement services will operate throughout the closure, with detailed travel advice to be issued ahead of the works.
Long-Term Benefits for Passengers and Freight
Once complete, the programme is expected to:
- Improve operational reliability and punctuality
- Increase network resilience against extreme weather
- Enhance accessibility for passengers
- Support economic growth and tourism in North Wales
The upgrades will also ensure the infrastructure can support increased service frequencies introduced in 2026 and accommodate future demand growth.
Stakeholder and Community Engagement
Network Rail has already begun engaging with communities through public drop-in events, particularly focused on the new footbridge installations.
The organisation is working closely with a wide range of stakeholders including:
- Transport for Wales
- Avanti West Coast
- Freight operators
- Local authorities and political representatives
- Businesses and community groups
Further details on timings, travel arrangements and consultation events will be released once planning is finalised.
Industry Perspective
Emma Osborn, Passenger Strategy Director for Network Rail Wales and Borders, said:
"This is one of the most significant upgrades to the North Wales Coast line in many years..”
“….and reflects our commitment to delivering the railway that passengers, freight operators, businesses and communities have told us they want and need.
"We know any closure of the railway will cause temporary disruption and we do not take that lightly. However, growth and improvement require investment, and investment on this scale inevitably means carrying out major engineering work. While there will be some short-term inconvenience, the long-term benefits for passengers, freight and the wider North Wales economy will far outweigh that disruption.
"By delivering this work through a continuous programme, we can complete it more quickly, safely and efficiently than would otherwise be possible, reducing the overall impact compared with prolonged weekend and overnight closures.
"This investment is about future-proofing a railway that so many people rely on every day. It will help improve reliability, resilience and accessibility, support the enhanced services introduced this year and create a stronger railway that can support economic growth, tourism and better connectivity across North Wales for decades to come.
"We have listened carefully to the aspirations of passengers, freight customers and stakeholders as plans have developed, and this programme represents a major step towards delivering the modern, reliable railway that North Wales deserves."
Image credit: Network Rail
