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Amended early morning Transport for Wales service between Carmarthen and Swansea on Thursday 11 and Friday 12 December 

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Engineering work details

Starts Thursday 11 December 2025 to Friday 12 December 2025

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Train operators affected

Route(s) affected

Between Carmarthen and Swansea / Cardiff Central / Shrewsbury

Description

Engineering work is taking place between Carmarthen and Swansea, closing some lines until 06:00 on Thursday 11 and Friday 12 December.

The 04:38 Carmarthen to Swansea service will not run. Rail replacement transport will run between Carmarthen and Swansea, leaving earlier at 04:09. It will call at Pembrey & Burry Port, Llanelli and Swansea.

The 04:47 Carmarthen to Shrewsbury service will not run. Rail replacement transport will run between Carmarthen and Llanelli, leaving at 04:10. It will call at Pembrey & Burry Port and Llanelli.

The 05:40 Carmarthen to Cardiff Central service will be diverted between Carmarthen and Swansea. Departure times between Carmarthen and Swansea will be altered as a result.

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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