Department for International Trade A trade barrier is something that slows down, limits or prevents a UK business exporting to or investing in an overseas market. Trade barriers are tariff, non-tariff or overseas direct investment restrictions 17 Sep 2019 The tariffs we pay in key markets, along with non-tariff barriers, are continuing to make trade more costly and difficult. The sector has paid a total The trade barriers other than import quotas include voluntary export restraints, technical, administrative and other regulations, trade restrictions due to