“at least its member states operate under one set of regulations”
I have relatives who live (or have lived) in various EU countries and conducting business across borders does seem to be straightforward for them.
“conducting business across borders”
The exporting British companies should follow EU production and product laws.
The small British companies selling only to the EU should be able to avoid unnecessary EU laws.
Is the EU causing problems for American exporters?
What are these problems?
And do tell me why a Chinese company can sell into the EU without complying with EU labor laws.