Passengers waiting for delayed trains at Cardiff Central Station on Sunday evening Hundreds of rail passengers have suffered delays after a signalling problem disrupted services between Cardiff and Newport.
Replacement buses were laid on after trains were held up on Sunday.
Train companies said there was a “very limited” service, with journey times expected to be prolonged by up to an hour.
Disruption affected services run between Wales and England by Arriva, CrossCountry and First Great Western.
A BBC Wales journalist who was among those delayed at the station said a tannoy announcement had blamed the delay on cable theft between Cardiff and Newport.
However, First Great Western said later that there was no theft on the line, but that the problems were due to faulty equipment.
The company said delays would continue into Sunday evening, but should be fine by Monday morning.
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