Wrth iddo gynnal cyfarfod o’r Cyngor Prydeinig-Gwyddelig heddiw, bydd y Prif Weinidog, Carwyn Jones yn galw ar Lywodraeth y DU i sicrhau mynediad llawn a dilyffethair i'r farchnad sengl ac i warchod rhag rhwystrau yn erbyn masnachu.
First Minister Carwyn Jones will call on the UK Government to secure continued full and unfettered access to the single market and guard against barriers to trade when he hosts a meeting of the British-Irish Council (BIC) today (Friday 25 November).