Also giving evidence into the international connectivity through Welsh ports and airports were representatives from Milford Haven Port Authority, Associated British Ports and StenaLine.
StenaLine had earlier cancelled its 0315GMT sailing on Friday from Fishguard, west Wales, to Rosslare, but was still undecided whether the 1430GMT sailing would go ahead.
Irish Ferries' sailings from south west Wales between Pembroke and Rosslare have been cancelled for Friday, while StenaLine said its afternoon sailing from Fishguard was looking unlikely.