Gwasanaethau trên sy'n rhedeg rhwng Cymru a Llundain gael eu hailfapio fel eu bod yn cyd-fynd â masnachfraint newydd a gaiff ei chaffael a'i rheoli gan Lywodraeth Cymru.
Rail services operating between Wales and London could be re-mapped onto a new franchise procured and managed by the Welsh Government, Economy and Transport Secretary Ken Skates has said.