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Buses replace trains between Cardiff Bay / Cardiff Central and Radyr / Caerphilly via Cardiff Queen Street from 23:30 on Saturday 21 and all day Sunday 22 March  

See all service disruptions

Engineering work details

Starts Saturday 21 March 2026 to Sunday 22 March 2026

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Train operators affected

Route(s) affected

All Transport for Wales routes via Cardiff Queen Street

Description

Engineering work is taking place between Cardiff Queen Street and Heath High Level, closing all lines.

Saturday from 23:30:

The following trains will not run and will be replaced by a bus:

  • 23:32 Cardiff Queen Street to Cardiff Bay

  • 23:38 Cardiff Bay to Cardiff Queen Street

  • 23:48 Cardiff Queen Street to Cardiff Bay

  • 23:54 Cardiff Bay to Cardiff Queen Street

There is also a bus service replacing the 23:24 Cardiff Central to Pontypridd service between Cardiff Central and Radyr due to the train being diverted via Fairwater (City line).

Sunday:

Trains between Cardiff Central and Treherbert / Aberdare / Merthyr Tydfil will be diverted via Fairwater (City line).

Trains between Penarth and Coryton will run between Penarth and Cardiff Central only. An amended train service will run between Heath High Level and Rhymney.

Rail replacement buses will operate between:

  • Cardiff Central and Radyr via Cardiff Queen Street

  • Cardiff Central and Caerphilly

  • Cardiff Bay and Radyr

Your ticket will be accepted at no extra cost on Cardiff Bus route 6 between Cardiff Central and Cardiff Bay, and on Cardiff Bus services to / from Coryton.

Check before you travel:

If you are travelling on Sunday 22 March, you can plan your journey using the National Rail Enquiries Journey Planner

If you are travelling late night Saturday 21 March, these amendments are still to be uploaded.

You can plan your journey on buses by using the Traveline website

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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