Since I live 10 miles south of the border with NI, yes I do have a "dog in the fight " . And yes I am very apprehensive, ( it takes a lot to scare me at my age, ) with what will happen following the BREXIt. ...
At the very least it will breath new life into the cross border smuggling, which had started to reduce after changes in the diesel additives.That will encourage European gangs to join.
I have already seen the collapse of what was a viable frozen food manufacturing company,which I attribute to Brexit,in the last few weeks. The collapse in the value of sterling dipping from 70 cents to 90 cents, has meant that contracts written in sterling become unviable. To the shoppers in Iceland and ASDA it's just a reduction in choice, but to producers of mushrooms, flour and chickens it is loss of a market.
What will happen to UK consumers is that they will find a reduction in choice, it will be gradual but incessant, or they suffer hefty price rises. Incidentally the owners of that company are in the UK,and they have now lost their manufacturing wing..how long do they remain solvent?.
British goods are now selling at prices I don't remember since 2000, ,such is the fall in the value of sterling. What happens when those British suppliers start looking for raw materials on the global market?.
As I have said before, the EU have made a deal, your Parliament can accept or Reject it. That deal will not alter between now and March. The ball is in your court.