Good summary. The first two are irrelevant in the case of Ireland (I can't see anybody imposing restrictions on Irish people living in Northern Ireland, althoug

Good summary. The first two are irrelevant in the case of Ireland (I can't see anybody imposing restrictions on Irish people living in Northern Ireland, although I don't think the GFA specifically allows it) It's the last two that are the problem - the customs is the immediate one (as regulations won't change on March 31st), the latter has potential to cause major problems in the future, unless the UK remains aligned with EU standards.