Mae Llywodraethau Datganoledig Cymru, yr Alban a Gogledd Iwerddon wedi cyhoeddi galwad y cyd ar Lywodraeth y DU i drafod gyda nhw cyn y negodiadau â’r Undeb Ewropeaidd.
The Devolved Governments of Wales, Scotland and Northern Ireland have issued a joint call for the UK Government to engage with them on negotiations with the EU.