Continuing on this tangent, prior to my retirement I was working for a pharmaceutical wholesaler with depots in both GB and NI. The consequence of the WA was that NI was no longer to be supplied from GB but from the EU instead. I was having a little look at the regulations, as you do when it's possible that some system changes might come your way, and there are hundreds if not thousands of codes to categorise items, and we had 36,000 different product lines. That would have been fun for someone to do the admin. It was rather simpler prior to then, when staff at one of the GB depots would simply load up the lorry and send it to NI.