Simon Jenkins can be a bit of a loose cannon, but the "read more" link within DMcG's link is a good read (it was in G2 yesterday). It's about a village which the border runs through the middle of. It describes the horrors of life in the village before the Good Friday Agreement and the very real fears of the residents should the bridge in the village become part of a hard border, in terms of both an end to free trade and the prospect of the return of the Troubles. The piece also points out that there are over two hundred crossing points between the North and the Republic. I suppose yer brexiteers might see that as a useful potential bit of job creation...