Mae Ysgrifennydd yr Economi a’r Seilwaith Ken Skates wedi datgelu heddiw y cwmnïau sydd ar y rhestr fer i ddarparu gwasanaethau masnachfraint newydd Cymru a’r Gororau a’r Metro.
Economy and Infrastructure Secretary Ken Skates has today revealed the preferred bidders for services on the new Wales and Borders franchise and Metro.