I am not justifying anything to you, Keith. You dispute a statement, it is up to you to disprove it. But you may wish to read The UK trade forum take on tariffs. Particularly the simple statement For the most part, an increase in cost, such as one caused by the imposition of a new tariff, is passed onto the final buyer, otherwise known as you and I

After you have read that, you may want to find something published in mainstream sources by an eminent person who is still alive giving us something good about brexit. But I doubt you will.

DtG