An exit from the EU which leads to anything other than unfettered access to the European market or leads to non-tariff barriers, will be a significant challenge for the Welsh industry.
Os byddwn yn gadael yr UE heb fynediad dirwystr at farchnadoedd Ewrop neu â rhwystrau di-dariff, bydd hynny'n broblem fawr i'r diwydiant yng Nghymru.