On 12 March 2021 Welsh Ministers announced the decision to locate the border controls post serving Holyhead port at Plot 9, Parc Cybi, Holyhead.
Ar 12 Mawrth 2021 cyhoeddodd Gweinidogion Cymru y penderfyniad i leoli'r safle rheoli ffiniau sy'n gwasanaethu porthladd Caergybi ym Mhlot 9, Parc Cybi, Caergybi.