Gallai tariffau dros dro Llywodraeth y DU ar fewnforion, a fyddai'n dod i rym pe byddai Brexit Heb Gytundeb, yn golygu y gallai porthladdoedd Cymru ddioddef, yn ôl Ken Skates, Gweinidog yr Economi.
The UK Government’s temporary tariffs on imports, which would come into force in the event of a no deal Brexit, could see Welsh ports lose out, Economy Minister Ken Skates has said.