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Buses replace late night / early morning trains between Swansea / Llanelli and Carmarthen from Monday 5 to Friday 9 January 

See all service disruptions

Engineering work details

Starts Monday 05 January 2026 to Friday 09 January 2026

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Train operators affected

Route(s) affected

Transport for Wales between Shrewsbury / Cardiff Central / Swansea and Carmarthen

Description

Engineering work is taking place between Carmarthen and Llanelli, closing various lines overnight from Monday evening until Friday morning.

As a result:

Monday to Thursday:

  • The 23:20 Cardiff Central to Carmarthen will terminate at Llanelli, with road replacement transport from Llanelli to Carmarthen

Tuesday to Friday:

  • The 04:38 Carmarthen to Swansea will be cancelled throughout, and replaced with road transport

  • The 04:46 Carmarthen to Shrewsbury will start from Llanelli at 05:12. Road replacement transport will run from Carmarthen to Llanelli

Check before you travel:

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

Replacement bus travel advice:

For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.

You can find the pick-up and set-down location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.

Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.

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