Moreover, some of the agreements are not yet fully in force so there are bridging mechanisms in place to ensure trade can continue with minimal disruption.
Ar ben hynny, nid yw rhai o'r cytundebau mewn llawn rym eto, felly mae trefniadau pontio ar waith er mwyn sicrhau bod modd parhau i fasnachu, a bod cyn lleied o effaith â phosibl arno.