It strikes me that it sets a pretty bad precedent to have a public vote on a policy, then to just ignore the vote and not do the thing they voted for.
It may be the best option, though.

The whole Ireland problem seems like a pretty big deal. Whole lotta tanks and bombs and bombs and guns historically associated with dividing Ireland. It doesn't mean that's going to happen again, but Brexit necessarily imposes import/export BS onto the island again... I've not heard anyone talk about it thinking that will just resolve itself.