Keolis/Amey wins contract to run Welsh rail services
Arriva, which has been operating the franchise for 15 years, pulled out of the bidding last year.
Arriva, which has been operating the franchise for 15 years, pulled out of the bidding last year.
Passengers have been told to expect delays and cancellations across the network as 27 trains are withdrawn from service over safety concerns
Services between Porth and Treherbert are likely to be suspended until the end of today.