I have taken NTB data @rjbarfield1 gleaned from Government sources...
...and combined it with NISRA stats on GB goods
nisra.gov.uk/sites/nisra.go…
NTB's come to 16.3%.
If there is no FTA, tariffs add another 2.3%
But the average for goods entering the EU from GB in a no-deal scenario is 11%. ?!?
The particular mix of goods from GB to NI is servng to make the costs of a regulatory and customs barrier PARTICULARLY onerous.