But Nihil, surely a large part of the reason it was considered uncloseable was all the people continually crossing it in the course of work?
Not really, merry.
It was considered uncloseable politically and also practically, because it's so long and crooked.
The position (I shared) was that there was no way to close it practically and without massive political pushback from nationalists. Now Irish nationalism is making Drakeford noises about the germ-ridden Brits spreading disease through the pure Irish hinterlands.
It's hard to come back from that to insisting there is no de facto border and never has been.
Also, it has been the Gardaà rather than the PSNI or UK Force policing it. Again undermining arguments the Irish made against the border being closeable.