Er nad yw’r cyfrifoldeb dros y prosiect hwn, na’r cyllid ar ei gyfer, yn faterion datganoledig, mae fy swyddogion yn cydweithio â’r swyddogion sy’n cyfateb iddynt yn Whitehall i helpu i lywio’r achos busnes sy’n cael ei baratoi gan yr Adran Drafnidiaeth, a hynny am fod ystyriaethau economaidd ac amgylcheddol pwysig a ddeellir orau o safbwynt Cymreig.
While the responsibility for and funding of this project is a non-devolved matter, my officials are working with their counterparts in Whitehall to help inform the business case that the Department for Transport is preparing, as there are important economic and environmental considerations that are best understood from a Welsh perspective.