^ Without derailing this into a Brexit thread, the dealers did not know in 2016 about this as the EU trading arrangement was only determined just before Christmas 2020. Further, at the time of the referendum, we heard, "“Increasingly, the Norway option looks the best for the UK” (Aaron Banks, Leave.EU founder; Norway is in the Single Market), "“Wouldn't it be terrible if we were really like Norway and Switzerland? Really? They're rich. They're happy. They're self-governing” (Farage; those places are in the Single Market), "“Absolutely nobody is talking about threatening our place in the Single Market” Daniel Hannan MEP. That RFD's problems are a direct result of not being in the Single Market.
Further, the dealer was talking about his exports of firearms to the EU, which have collapsed due to non-tariff trade barriers. I might add that my idea to drive to the Cold Bore range in Denmark via France, Belgium and Germany with a car full of guns and ammo, has also collapsed as my European Firearms Pass is no longer valid and I would have to obtain a visitor firearms permit for all of France, Belgium, Germany and Denmark.