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Amended service in the Carmarthen area on Sunday 7 December: buses replace trains between Carmarthen and Swansea 

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Engineering work details

Starts Sunday 07 December 2025 to Sunday 07 December 2025

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Route(s) affected

Great Western Railway between Carmarthen and London Paddington

Transport for Wales between Fishguard Harbour and Swansea, between Milford Haven and Carmarthen / Newport (South Wales) / Manchester Piccadilly, between Pembroke Dock and Carmarthen, and also between Carmarthen and Swansea / Manchester Piccadilly

Description

Engineering work is taking place in the Carmarthen area, closing all lines until approximately 13:00 on Sunday 7 December.

Great Western Railway

The 10:27 Swansea to Carmarthen service will not run. It will be replaced by earlier road transport which will depart Swansea at 10:00, calling at Llanelli, Pembrey & Burry Port and Carmarthen. It is expected to arrive at Carmarthen for 11:12.

The 11:25 Carmarthen to London Paddington service will start from Swansea. Road transport will depart Carmarthen at 11:56, calling at Pembrey & Burry Port, Llanelli and Swansea. It is expected to arrive at Swansea for 13:13. This will allow customers requiring stations to London Paddington to connect with the 13:23 Swansea to London Paddington service.

Transport for Wales

Before 13:00:

  • Fishguard Harbour - Carmarthen services will run between Fishguard Harbour and Whitland only

  • Milford Haven - Carmarthen services will run between Milford Haven and Haverfordwest / Whitland only

  • Buses will be available between Whitland and Carmarthen

  • Buses will replace trains between Pembroke Dock and Carmarthen

  • Buses will replace trains between Carmarthen and Swansea

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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