The focus has been on trade between Great Britain and Northern Ireland and how customs is arranged.
1/4
1. What happens to butter made in Northern Ireland and sold in the Republic? It's essentially duty-free even though the EU has a high tariff
2/4
3. What happens to French butter shipped to Northern Ireland via Dublin? No duty charged either?
3/4
Surely it would a violation of non-discrimination (GATT Art1, MFN) in the absence of a formal free trade agreement?
4/4