Handling whichever new checks are required on trade with the EU will undoubtedly require increased border infrastructure in Welsh ports such as Holyhead, Pembroke Dock and Fishguard.
Heb amheuaeth, bydd ymdrin ag unrhyw wiriadau newydd sy’n ofynnol wrth fasnachu â’r UE yn gofyn am fwy o seilwaith ffiniau ym mhorthladdoedd Cymru, megis Caergybi, Doc Penfro ac Abergwaun.