Network Rail is urging rail passengers to "only travel if absolutely necessary", expect widespread disruption and plan ahead during industrial action. An "extremely limited" service – roughly only 20% of services – will operate between 7.30 and 6.30pm.
First trains on strike days - Saturday, Monday and Wednesday, will start later, with the last services leaving much earlier. And disruption should also be expected in the morning of the day after each strike as the railway recovers from the previous day’s strikes.
Those attending the Wales vs New Zealand rugby union game at the Principality Stadium on Saturday are being told to not travel by train. Up to 35,000 people typically travel into Cardiff by train for international rugby matches, with more than 20,000 getting a return home.