Rydym yn anfon copi o’r llythyr hwn at Brif Weinidog y DU, yr Ysgrifennydd Gwladol dros Ymadael â’r UE, Prif Weinidog yr Alban, Prif Weinidog Cymru a David Sterling, Pennaeth Gwasanaeth Sifil Gogledd Iwerddon.
We are copying this letter to the Prime Minister, the Secretary of State for Exiting the EU, the First Minister of Scotland, the First Minister of Wales, and to David Sterling as Head of the Northern Ireland Civil Service.