Ceir adroddiadau hefyd bod traffig a arferai deithio o Gymru i ogledd Iwerddon trwy Weriniaeth Iwerddon nawr yn teithio trwy ogledd Lloegr neu’r Alban yn syth i ogledd Iwerddon os ydyn nhw’n mynd o gwbl.
There are also reports that freight traffic which used to travel between Wales and northern Ireland via the Republic of Ireland, is now rerouting through the north of England or Scotland direct to northern Ireland or is not travelling at all.