05 Jun 2025
Between Monday 9 June and Friday 13 June, major engineering work will be taking place between Cardiff Central and Newport.
Trains will still run but will use the slower relief set of tracks on this part of the route. As a result, most main line South Wales train services will be amended, with services having extended journey times.
Services between Cardiff and Newport will also be busier than usual as the number of services running between Cardiff and Newport will be reduced.
Due to the Severn Tunnel also being closed 9 June - 20 June, GWR will only be running an hourly London service via Gloucester on this section of the line. Customers are advised to check their journey plans before they travel.
Notes to editors
Marches
Southbound services from Manchester Piccadilly, Holyhead, Chester, Crewe, Hereford and Shrewsbury to Cardiff Central will have extended journey times between Cwmbran and Cardiff Central.
Northbound services from Cardiff to these destinations will depart Cardiff Central earlier, allowing them to run from their usual departure times from Newport onwards.
The 05:43 Swansea to Manchester Piccadilly will not call at Craven Arms (08:25) and Church Stretton (08:34).
Ebbw Vale / Maesteg / Cheltenham
Ebbw Vale to Cardiff Central services will be diverted and call additionally at Newport with extended journey times. Trains from Cardiff to Ebbw Vale will depart Cardiff Central earlier than usual. Most Ebbw Vale services will not extend to Maesteg except for some late-night services.
West Wales
Many services to and from West Wales (Swansea, Carmarthen, Milford Haven, Pembroke Dock and Fishguard Harbour) will be affected, with services being retimed, journey times extended, some services not running and through services to and from Swansea, Cardiff and Manchester in particular being affected.
Visit our service amendments webpage for more details on the works.
