Now after 40+ years the EU has create frictionless trade for member states. Around the world the EU has built up 759 trade agreements with 160 countries.
If the UK leave without a deal, all of this disappears.
So, the Spanish government won’t give two hoots about Carlos stuck with all his fruit and veg? Similarly the Italian government with their olives, the Dutch with their tulips, the Germans with their cars and the French with their garlic and, er, horse meat. Get real. They need our custom and they will come to an agreement, pretty quickly, that will suit both parties.