Byddai Brexit heb gytundeb yn cael effaith drychinebus ar Gymru – mae’r neges honno wedi’i chyfleu’n gyson i Lywodraeth y Deyrnas Unedig ac fe’i hailadroddais yn fy nghyfarfod gyda’r Prif Weinidog ar 30 Gorffennaf.
A no deal Brexit would have a catastrophic impact on Wales – a message which has been consistently put to the UK government time and again, most recently when I met the Prime Minister on 30 July.