The article discusses the effects of Brexit on trade between the UK and EU, focusing on rules that determine where goods are made. It explores how Brexit could lead to new tariffs and customs checks, affecting businesses and trade with countries outside the EU. The choices made in designing these rules could impact how goods move between the UK and EU, as well as how EU goods are treated in trade agreements with other countries. Finding the right trade rules will be crucial for both the UK and EU to maintain smooth trade relations post-Brexit.