The other problem with any deal removing us from the Eu is that a lot of things are devolved. There are many things devolved to Edinburgh and Cardiff what if the British government agree deals with the USA over things that are devolved. If these devolved Parliaments reject these products the U.K. government will need to take these powers back or else we would require some sort of checks at the borders.
This Brexit thing is really complicated not simple like and “in or out” question on a ballot paper.