Wales' busiest rail company is urging customers not to travel by train during the strikes next week as only two services will actually be able to run. The strikes are currently planned for June 21, 23 and 25, with disruption expected across the whole of UK's rail network.
Transport for Wales staff are not involved in the strike action, but services here will be affected because Network Rail staff are.
That is why the company says passengers should not travel by train on June 21, 23 and 25, and only if essential on June 20, 22, 24 and 26.