The thing that is totally ignored by Brexitera is just how many companies in the rest of the EU are planning now and ready to try and replace the British goods that become too expensive with tariffs.
An you think our companies are not doing the same ?, with the added bonus that goods on the world market are cheaper than within the EU.
Meanwhile the British public is looking forward to replacing champagne with sparkling Colombian, Mercedes with Great Wall and French and German energy with power cuts. It is the opportunity cost that really matters . Europe has 20+ countries to fill the gap within the group