Mae Ysgrifennydd yr Economi a Thrafnidiaeth Ken Skates wedi dweud wrth aelodau'r Cynulliad bod y cynlluniau ar gyfer creu canolfan o fri rhyngwladol ar gyfer profi trenau wedi cymryd cam anferthol ymlaen.
Economy and Transport Secretary Ken Skates has told Assembly Members that plans for a world-leading rail testing complex have taken a huge step forward.