The UK is still a member due to the 5th column who have infiltrated Westminster.The GFA is still there. And the UK is still in the EU (because the UK parliament is incompetent. There's nowhere else to lay the blame ).
It is highly possible that, if or when the UK finally manage to organise themselves to leave the EU, then the GTA will no longer be there.
This is the point.
Honestly, you're following the same line as those who say, "Brexit's no problem, I"ve no trouble with my suppliers and buying online." Of course they don't, Brexit hasn't happened yet and, despite all the huffing and puffing, The UK is still a member of the EU.