Interior of a large sanitary sewer viewed from an access manhole. In the developed world, sewers are pipes from buildings to one or more levels of larger underground trunk mains, which transport the sewage to sewage treatment facilities.
Free trade is a policy followed by some international markets in which countries' governments do not restrict imports from, or exports to, other countries. Free trade is exemplified by the European Economic Area and the North American Free Trade Agreement, which have established open markets. Most nations are today members of the World Trade Organization (WTO) multilateral trade agreements.
I'm afraid you've been lied to. The UK never, at any point, lost its sovereignty. It agreed to cooperate on a variety of trade matters, including the four key pillars of the EU system: free movement of goods, labour, services, and capital. It did this in exchange for the many benefits that it derived from it: no customs duties on British exports, British workers can work anywhere, all kinds of ...