Ok then, tell me in detail how the N.I/Eire can avoid avoid physical border infrastructure between the two countries when one is outside the customs union, when Norway/Sweeden who are both in the customs union require physical infastructure?

Just read the article. Dan, like many people, knows it is a problem (me included), but also like many people does not provide a solution.

It is so easy to criticize from the sidelines.