Brexit

[Witton Park]

Why would Ireland do that?
A quick Google
Also shown is each import country's percentage of total Irish exports.

United States: US$36.1 billion (26.8% of total Irish exports)
United Kingdom: $18.3 billion (13.5%)
Belgium: $15 billion (11.1%)
Germany: $10.8 billion (8%)
Switzerland: $7 billion (5.2%)
Netherlands: $6.7 billion (4.9%)
France: $5.9 billion (4.3%)

So you are suggesting Ireland turns its back on Europe inorder to stay close to the UK? As shown below the UK has a trade surplus with Ireland, wonder how that goes once all those lovely tarrifs kick in.

It's a decision for Ireland to consider. I wasn't advocating it, merely pointing it out that I don't think the suggestion is a merger with the United Kingdom, just a trade alignment.

I wonder if anyone in Ireland has done any economic modelling for a post Brexit world.

I can quite imagine if the UK manages a successful Brexit, there will be an increase in those in Ireland considering Irexit and that may also be affected by any more meddling by the EU in Ireland's fiscal policy.