Oh no. What will we do if the EU aren't selling to us any more? Perhaps we will start a supply chain - i.e. create jobs - in the UK instead. I'm sure that future generations will look at us and wonder what the heck we were doing transporting goods all over the place. Vehicles criss-cross the border five times during the manufacturing process - that is insane and not very environmental.
Indeed. If the EU won't sell their stuff to us, we'll just make it ourselves and improve our economy, not there's!
As for the travel and border crossings, you're exactly right. Insane the amount of transport going on, not just the cost but the environmental impact of wastage of scarce resources and pollution.
On that subject, a classic example of insane EU regulations. New regulations were introduced about emissions from railway locomotives. Basically, new ones had to have low emissions after a certain cut off date. Unfortunately the UK had a large order of new locomotives, but their production was delayed so by the time they were finished and imported, the date would have passed and they'd have been illegal and unusable. So, to get around the new EU legislation, they were transported and imported into the UK in an unfinished state, so that they met the import date deadline, and then shipped back again to be finished, and then re-imported again and put into use. Just how much pollution was caused and resources were used for all that - all under the new "green" regulations!! You couldn't make it up!