Gan dynnu sylw at effeithiau posib methu â dod i gytundeb, dywedodd Prif Weinidog y byddai troi cefn ar y trafodaethau yn achosi anhrefn a niwed parhaus i economi'r DU a'i diogelwch yn y dyfodol.
Setting out the potential repercussions of ‘no deal’, the First Minister said that walking away from the negotiations would cause chaos and lasting damage to the UK’s economy and future security.