Ddoe, gwahoddodd Llywodraeth Cymru Abellio Rail Cymru, Trenau Arriva Cymru, KeolisAmey a MTR Corporation (Cymru) Ltd i gyflwyno tendrau terfynol ar gyfer Gwasanaeth Rheilffyrdd nesaf Cymru a'r Gororau a fydd yn dod i rym ym mis Hydref 2018.
Yesterday,  Abellio Rail Cymru, Arriva Rail Wales, KeolisAmey and MTR Corporation (Cymru) Ltd were invited by Welsh Government to submit final tenders for the next Wales and Borders Rail Service, which will come into force in October 2018.