Mae’r senario waethaf sy’n rhesymol ei thybied sydd wedi’i chyhoeddi gan Lywodraeth y DU yn pwysleisio y gallai 40% i 70% o gerbydau nwyddau trwm sy’n cyrraedd porthladdoedd ar ôl diwedd y cyfnod pontio gael eu gwrthod am nad oes ganddynt y dogfennau cywir.
The reasonable worst case scenario published by the UK government highlights that 40% to 70% of HGVs arriving at ports after the end of the Transition Period could be turned away as they do not have the right documentation.