Updated at: 27-Nov-2025 10:11:40: AM
Operator: Great Western Railway
Routes affected:
Great Western Railway between London Paddington and Swansea / Carmarthen
Transport for Wales between Cardiff Central and Swansea / Carmarthen / Pembroke Dock / Milford Haven / Fishguard Harbour, between Manchester Piccadilly and Swansea / Carmarthen / Pembroke Dock / Milford Haven / Fishguard Harbour and also between Shrewsbury and Swansea / Fishguard Harbour
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Description of Incident
Engineering work is taking place at Swansea, closing all lines.
Great Western Railway:
Monday 26 January to Thursday 5 February:
Rail replacement buses will operate between Port Talbot Parkway and Swansea, calling at Neath. Some buses will operate to / from Llanelli.
Most trains between London Paddington and Swansea / Carmarthen will run between London Paddington and Port Talbot Parkway only.
Friday 6 February:
As a result of trains being out of place due to the engineering work, the following trains will be amended:
The following trains will not run:
- 03:46 Swansea to London Paddington
- 06:54 Swansea to London Paddington
- 07:44 Swansea to London Paddington
- 08:18 London Paddington to Cardiff Central
- 10:16 London Paddington to Cardiff Central
- 10:50 Cardiff Central to London Paddington
- 11:16 London Paddington to Cardiff Central
- 12:50 Cardiff Central to London Paddington
- 13:50 Cardiff Central to London Paddington
Additionally, the 05:57 Swansea to London Paddington service will start from Cardiff Central at 06:51.
Transport for Wales:
Monday 26 January to Thursday 5 February:
Rail replacement buses will operate between Port Talbot Parkway and Llanelli.
A limited service will operate between Cardiff Central and Carmarthen via Llangennech in the mornings and late evenings.
Most trains between Manchester Piccadilly / Cardiff Central and Swansea / Carmarthen will run between Manchester Piccadilly / Cardiff Central and Port Talbot Parkway only.
Two trains per hour will operate from Llanelli to Carmarthen / Pembroke Dock / Milford Haven / Fishguard Harbour.
Services between Shrewsbury and Swansea via Llandrindod will be diverted to run via Carmarthen.
Please note that on Tuesday 27 January, northbound Heart of Wales services will be further amended due to additional engineering works near Llanelli.
Monday 26 to Friday 30 January:
The 05:13 Swansea to Llandovery and 06:41 Llandovery to Swansea train services will not run, and will be replaced by buses.
Gowerton:
For travel to / from Gowerton, half-hourly rail replacement buses will be in operation between Swansea and Llanelli via Gowerton each day. This is due to a low bridge that prevents rail replacement coaches from serving the station. If you are travelling from Gowerton towards Swansea and then onto further destinations, you should change between rail replacement buses at Swansea to complete your journey.
Friday 6 February:
Transport for Wales are unaffected by any work on this date.
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.
For the very latest National Rail information click here.
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This page created on: 04-Nov-2025 12:15:40: PM