One week to go: Major rail upgrades underway in South Wales

Friday 25 Jul 2025

One week to go: Major rail upgrades underway in South Wales

Region & Route:: Wales & Western: Wales & Borders

Network Rail (Wales and Borders) has started a comprehensive programme of engineering works across key rail corridors in South Wales as part of its ongoing commitment to maintaining and improving rail infrastructure.

The works, taking place between Saturday 2 August and Monday 11 August, involve track renewals, drainage improvements, and essential maintenance to keep a safe and reliable railway for passengers and freight operators alike.

Areas affected are:

Dynevor Junction to Morlais Junction
Jersey Marine to Hendy
Llangyfelach Tunnel and surrounding track sections
Penllergaer Tunnel to Grovesend

Key engineering activities include:

Track renewals through Llangyfelach Tunnel, and various sections between Dynevor Junction and Felin Fran Junction.
Track and drainage upgrades and renewals between Grovesend and Penllergaer

The works will improve track reliability and see smoother journeys for passengers, while reducing the risk of service delays and the potential for anything going wrong with the infrastructure. They will also increase resilience against extreme weather.

Network Rail is grateful for the patience and understanding of passengers while we complete this important work.

Please check your travel plans at www.nationalrail.co.uk and allow extra time for your journeys.

Contact information

Passengers / community members
Network Rail national helpline
03457 11 41 41

Latest travel advice
Please visit National Rail Enquiries

Journalists
Gary Gerrard
Media Relations Manager
Network Rail
gary.gerrard@networkrail.co.uk

About Network Rail

We own, operate and develop Britain's railway infrastructure; that's 20,000 miles of track, 30,000 bridges, tunnels and viaducts and the thousands of signals, level crossings and stations. We run 20 of the UK's largest stations while all the others, over 2,500, are run by the country's train operating companies.

Usually, there are almost five million journeys made in the UK and over 600 freight trains run on the network. People depend on Britain's railway for their daily commute, to visit friends and loved ones and to get them home safe every day. Our role is to deliver a safe and reliable railway, so we carefully manage and deliver thousands of projects every year that form part of the multi-billion pound Railway Upgrade Plan, to grow and expand the nation's railway network to respond to the tremendous growth and demand the railway has experienced - a doubling of passenger journeys over the past 20 years.

Media centre