Mae Prif Weinidogion Cymru a'r Alban wedi galw ar Theresa May i weithio gyda'r gwledydd datganoledig wrth iddynt gyhoeddi eu gwelliannau ar y cyd i Fil Brexit Llywodraeth y DU.
The First Ministers of Wales and Scotland call on the PM to work with devolved nations as they publish amendments to the Brexit Bill.