Future engineering work

PAGE LAST UPDATED: 23/02/2019 05:01. Update now

See details of routes affected by planned engineering works, including when they take effect, maps of the affected area, alternative timetables, advice for alternative travel and real-time updates.

Amended service between Cardiff Central and Newport / Cwmbran from Monday 23 until Friday 27 April

Start date
23/04/2018  00:00
End date
Route affected
Download map of route afected

Arriva Trains Wales between Fishguard Harbour / Milford Haven / Carmarthen / Swansea / Cardiff Central and Gloucester / Hereford / Shrewsbury / Crewe / Chester / Manchester Piccadilly / Llandudno / Holyhead

CrossCountry between Cardiff Central and Bristol Temple Meads / Birmingham New Street / Nottingham / Manchester Piccadilly

Great Western Railway between Carmarthen / Cardiff Central and Swansea / Bristol Temple Meads / Weston-super-Mare / Taunton / St James Park / Westbury / Frome / Paignton / Portsmouth Harbour / London Paddington

TOC(s) affected
Transport for WalesCrossCountryGreat Western Railway

Engineering work is taking place each day between Cardiff Central and Newport / Cwmbran from 23:00 on Sunday, closing some lines.

Arriva Trains Wales:

Buses will in be operation between Cardiff and Cwmbran and Newport and Cwmbran each day affecting services between Cardiff and Manchester Piccadilly / Holyhead.

There will be a direct bus service between Cardiff and Cwmbran and a direct bus service between Newport and Cwmbran.


CrossCountry services running to / from Newport and Cardiff Central will be retimed to arrive / depart a few minutes earlier or later than usual.

Great Western Railway:

Services between South Wales and London, and also between South Wales and South West England will be retimed to run around 7 minutes earlier or later than usual.

Check before you travel:

You can plan your journey using the National Rail Enquiries Journey Planner


You can find the location of your bus replacement by checking station signs or by searching for your station on our station information pages


Non folding bicycles are not allowed on rail replacement bus services at any time. Folding bicycles are allowed if fully folded. For more information, please see here.

Project Information:

The Great Western Route Modernisation project is the biggest investment in the Great Western railway since Brunel built it more than 150 years ago. Modernising the route will improve the experience of everyone who uses it and stimulate economic growth in the South West and beyond.

Network Rail are electrifying one of Britain's oldest and busiest railways, providing greener, more reliable journeys and improving connections across southern England and South Wales: London and Bristol, including Cardiff, Newbury and Oxford. This project is also part of the London Railway Upgrade Plan, creating new connections and increasing capacity in peak hour by 30%.