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Amended late night / early morning Transport for Wales trains in the Carmarthen / Swansea area from Monday 6 to Friday 10 April 

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Engineering work details

Starts Monday 06 April 2026 to Friday 10 April 2026

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Train operators affected

Route(s) affected

Transport for Wales between Carmarthen and Swansea / Cardiff Central, between Llandovery and Swansea

Description

Engineering work is taking place in the Carmarthen / Swansea area, closing various lines overnight from Monday evening until Friday morning.

Monday to Thursday:

The 21:46 Fishguard Harbour to Cardiff Central will be diverted to run on an alternative route between Llanelli and Port Talbot Parkway, not calling at stations via Swansea. A replacement bus will run from Llanelli to Port Talbot Parkway.

The 23:20 Cardiff Central to Carmarthen will terminate at Llanelli. A replacement bus will run from Llanelli to Carmarthen.

The 23:48 Swansea to Carmarthen will not run, and will be replaced by a bus.

Tuesday to Friday:

The 04:38 Carmarthen to Swansea will not run, and will be replaced by a bus.

The 05:13 Swansea to Llandovery will start from Llanelli at 05:28, with an earlier rail replacement bus from Swansea to Llanelli, connecting with the train.

Check before you travel:

These changes are not currently shown in the National Rail Enquiries Journey Planner, please check back nearer to the time of travel.

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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