Rydym wedi codi'r pryderon hyn ar frys gyda Llywodraeth y DU, a byddwn yn pwyso arni i sicrhau y bydd pob cam posibl yn cael eu cymryd i hwyluso traffig sy'n teithio rhwng Cymru a Gogledd Iwerddon ac i sicrhau nad yw busnesau'n cael eu gorfodi i ddewis rhwng gofynion tramwy beichus, cymryd llwybrau hirach ac felly mwy costus drwy Loegr neu'r Alban, neu beidio â theithio'n gyfan gwbl.
We have urgently escalated these concerns to the UK Government, and will be pressing for every possible facilitation to be made available to traffic travelling between Wales and Northern Ireland and to make sure businesses aren’t forced to choose between burdensome transit requirements, taking longer and therefore costlier routes through England or Scotland, or simply not travelling altogether.